var-201408-0298
Vulnerability from variot
Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via network traffic that appears to come from an intended acceptor, but specifies a security mechanism different from the one proposed by the initiator. MIT Kerberos 5 is prone to a remote denial-of-service vulnerability. Attackers can exploit this issue to cause a program to crash, resulting in denial-of-service conditions. Versions prior to Kerberos 5 1.12.2 are vulnerable.
CVE-2014-4343
An unauthenticated remote attacker with the ability to spoof packets
appearing to be from a GSSAPI acceptor can cause a double-free
condition in GSSAPI initiators (clients) which are using the SPNEGO
mechanism, by returning a different underlying mechanism than was
proposed by the initiator.
CVE-2014-4344
An unauthenticated or partially authenticated remote attacker can
cause a NULL dereference and application crash during a SPNEGO
negotiation by sending an empty token as the second or later context
token from initiator to acceptor.
For the stable distribution (wheezy), these problems have been fixed in version 1.10.1+dfsg-5+deb7u2.
For the unstable distribution (sid), these problems have been fixed in version 1.12.1+dfsg-7. ========================================================================== Ubuntu Security Notice USN-2310-1 August 11, 2014
krb5 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in Kerberos. This issue only affected Ubuntu 12.04 LTS. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. (CVE-2014-4344)
Tomas Kuthan and Greg Hudson discovered that the Kerberos kadmind daemon incorrectly handled buffers when used with the LDAP backend. (CVE-2014-4345)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 14.04 LTS: krb5-admin-server 1.12+dfsg-2ubuntu4.2 krb5-kdc 1.12+dfsg-2ubuntu4.2 krb5-kdc-ldap 1.12+dfsg-2ubuntu4.2 krb5-otp 1.12+dfsg-2ubuntu4.2 krb5-pkinit 1.12+dfsg-2ubuntu4.2 krb5-user 1.12+dfsg-2ubuntu4.2 libgssapi-krb5-2 1.12+dfsg-2ubuntu4.2 libgssrpc4 1.12+dfsg-2ubuntu4.2 libk5crypto3 1.12+dfsg-2ubuntu4.2 libkadm5clnt-mit9 1.12+dfsg-2ubuntu4.2 libkadm5srv-mit9 1.12+dfsg-2ubuntu4.2 libkdb5-7 1.12+dfsg-2ubuntu4.2 libkrad0 1.12+dfsg-2ubuntu4.2 libkrb5-3 1.12+dfsg-2ubuntu4.2 libkrb5support0 1.12+dfsg-2ubuntu4.2
Ubuntu 12.04 LTS: krb5-admin-server 1.10+dfsg~beta1-2ubuntu0.5 krb5-kdc 1.10+dfsg~beta1-2ubuntu0.5 krb5-kdc-ldap 1.10+dfsg~beta1-2ubuntu0.5 krb5-pkinit 1.10+dfsg~beta1-2ubuntu0.5 krb5-user 1.10+dfsg~beta1-2ubuntu0.5 libgssapi-krb5-2 1.10+dfsg~beta1-2ubuntu0.5 libgssrpc4 1.10+dfsg~beta1-2ubuntu0.5 libk5crypto3 1.10+dfsg~beta1-2ubuntu0.5 libkadm5clnt-mit8 1.10+dfsg~beta1-2ubuntu0.5 libkadm5srv-mit8 1.10+dfsg~beta1-2ubuntu0.5 libkdb5-6 1.10+dfsg~beta1-2ubuntu0.5 libkrb5-3 1.10+dfsg~beta1-2ubuntu0.5 libkrb5support0 1.10+dfsg~beta1-2ubuntu0.5
Ubuntu 10.04 LTS: krb5-admin-server 1.8.1+dfsg-2ubuntu0.13 krb5-kdc 1.8.1+dfsg-2ubuntu0.13 krb5-kdc-ldap 1.8.1+dfsg-2ubuntu0.13 krb5-pkinit 1.8.1+dfsg-2ubuntu0.13 krb5-user 1.8.1+dfsg-2ubuntu0.13 libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.13 libgssrpc4 1.8.1+dfsg-2ubuntu0.13 libk5crypto3 1.8.1+dfsg-2ubuntu0.13 libkadm5clnt-mit7 1.8.1+dfsg-2ubuntu0.13 libkadm5srv-mit7 1.8.1+dfsg-2ubuntu0.13 libkdb5-4 1.8.1+dfsg-2ubuntu0.13 libkrb5-3 1.8.1+dfsg-2ubuntu0.13 libkrb5support0 1.8.1+dfsg-2ubuntu0.13
In general, a standard system update will make all the necessary changes.
Affected packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-crypt/mit-krb5 < 1.13 >= 1.13
Description
Multiple vulnerabilities have been discovered in MIT Kerberos 5. Please review the CVE identifiers referenced below for details.
Workaround
There is no known workaround at this time.
Resolution
All MIT Kerberos 5 users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/mit-krb5-1.13"
References
[ 1 ] CVE-2014-4341 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4341 [ 2 ] CVE-2014-4343 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4343 [ 3 ] CVE-2014-4345 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4345 [ 4 ] CVE-2014-5351 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-5351
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-201412-53.xml
Concerns?
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.
License
Copyright 2014 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.5
. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
===================================================================== Red Hat Security Advisory
Synopsis: Moderate: krb5 security, bug fix and enhancement update Advisory ID: RHSA-2015:0439-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0439.html Issue date: 2015-03-05 CVE Names: CVE-2014-4341 CVE-2014-4342 CVE-2014-4343 CVE-2014-4344 CVE-2014-4345 CVE-2014-5352 CVE-2014-5353 CVE-2014-9421 CVE-2014-9422 CVE-2014-9423 =====================================================================
- Summary:
Updated krb5 packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having Moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Kerberos is a networked authentication system which allows clients and servers to authenticate to each other with the help of a trusted third party, the Kerberos KDC.
- Relevant releases/architectures:
Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64
- Description:
A NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO acceptor for continuation tokens. A remote, unauthenticated attacker could use this flaw to crash a GSSAPI-enabled server application. (CVE-2014-4344)
A buffer overflow was found in the KADM5 administration server (kadmind) when it was used with an LDAP back end for the KDC database. A remote, authenticated attacker could potentially use this flaw to execute arbitrary code on the system running kadmind. (CVE-2014-4345)
A use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5 library processed valid context deletion tokens. An attacker able to make an application using the GSS-API library (libgssapi) call the gss_process_context_token() function could use this flaw to crash that application. (CVE-2014-5352)
If kadmind were used with an LDAP back end for the KDC database, a remote, authenticated attacker with the permissions to set the password policy could crash kadmind by attempting to use a named ticket policy object as a password policy for a principal. (CVE-2014-5353)
A double-free flaw was found in the way MIT Kerberos handled invalid External Data Representation (XDR) data. An authenticated user could use this flaw to crash the MIT Kerberos administration server (kadmind), or other applications using Kerberos libraries, using specially crafted XDR packets. (CVE-2014-9421)
It was found that the MIT Kerberos administration server (kadmind) incorrectly accepted certain authentication requests for two-component server principal names. A remote attacker able to acquire a key with a particularly named principal (such as "kad/x") could use this flaw to impersonate any user to kadmind, and perform administrative actions as that user. (CVE-2014-9422)
An information disclosure flaw was found in the way MIT Kerberos RPCSEC_GSS implementation (libgssrpc) handled certain requests. An attacker could send a specially crafted request to an application using libgssrpc to disclose a limited portion of uninitialized memory used by that application. (CVE-2014-9423)
Two buffer over-read flaws were found in the way MIT Kerberos handled certain requests. A remote, unauthenticated attacker able to inject packets into a client or server application's GSSAPI session could use either of these flaws to crash the application. An attacker able to spoof packets to appear as though they are from an GSSAPI acceptor could use this flaw to crash a client application that uses MIT Kerberos. (CVE-2014-4343)
Red Hat would like to thank the MIT Kerberos project for reporting the CVE-2014-5352, CVE-2014-9421, CVE-2014-9422, and CVE-2014-9423 issues. MIT Kerberos project acknowledges Nico Williams for helping with the analysis of CVE-2014-5352.
The krb5 packages have been upgraded to upstream version 1.12, which provides a number of bug fixes and enhancements, including:
-
Added plug-in interfaces for principal-to-username mapping and verifying authorization to user accounts.
-
When communicating with a KDC over a connected TCP or HTTPS socket, the client gives the KDC more time to reply before it transmits the request to another server. (BZ#1049709, BZ#1127995)
This update also fixes multiple bugs, for example:
- The Kerberos client library did not recognize certain exit statuses that the resolver libraries could return when looking up the addresses of servers configured in the /etc/krb5.conf file or locating Kerberos servers using DNS service location. The library could treat non-fatal return codes as fatal errors. Now, the library interprets the specific return codes correctly. (BZ#1084068, BZ#1109102)
In addition, this update adds various enhancements. Among others:
-
Added support for contacting KDCs and kpasswd servers through HTTPS proxies implementing the Kerberos KDC Proxy (KKDCP) protocol. (BZ#1109919)
-
Solution:
All krb5 users are advised to upgrade to these updated packages, which correct these issues and add these enhancements.
Before applying this update, make sure all previously released errata relevant to your system have been applied.
For details on how to apply this update, refer to:
https://access.redhat.com/articles/11258
- Bugs fixed (https://bugzilla.redhat.com/):
1084068 - ipv6 address handling in krb5.conf 1102837 - Please backport improved GSSAPI mech configuration 1109102 - Kerberos does not handle incorrect Active Directory DNS SRV entries correctly 1109919 - Backport https support into libkrb5 1116180 - CVE-2014-4341 krb5: denial of service flaws when handling padding length longer than the plaintext 1118347 - ksu non-functional, gets invalid argument copying cred cache 1120581 - CVE-2014-4342 krb5: denial of service flaws when handling RFC 1964 tokens 1121789 - CVE-2014-4343: use-after-free crash in SPNEGO 1121876 - CVE-2014-4343 krb5: double-free flaw in SPNEGO initiators 1121877 - CVE-2014-4344 krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens 1127995 - aggressive kinit timeout causes AS_REQ resent and subsequent OTP auth failure 1128157 - CVE-2014-4345 krb5: buffer overrun in kadmind with LDAP backend (MITKRB5-SA-2014-001) 1166012 - libkadmclnt SONAME change (8 to 9) in krb5 1.12 update 1174543 - CVE-2014-5353 krb5: NULL pointer dereference when using a ticket policy name as a password policy name 1179856 - CVE-2014-5352 krb5: gss_process_context_token() incorrectly frees context (MITKRB5-SA-2015-001) 1179857 - CVE-2014-9421 krb5: kadmind doubly frees partial deserialization results (MITKRB5-SA-2015-001) 1179861 - CVE-2014-9422 krb5: kadmind incorrectly validates server principal name (MITKRB5-SA-2015-001) 1179863 - CVE-2014-9423 krb5: libgssrpc server applications leak uninitialized bytes (MITKRB5-SA-2015-001) 1184629 - kinit loops on principals on unknown error
- Package List:
Red Hat Enterprise Linux Client (v. 7):
Source: krb5-1.12.2-14.el7.src.rpm
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-libs-1.12.2-14.el7.i686.rpm krb5-libs-1.12.2-14.el7.x86_64.rpm krb5-pkinit-1.12.2-14.el7.x86_64.rpm krb5-workstation-1.12.2-14.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-devel-1.12.2-14.el7.i686.rpm krb5-devel-1.12.2-14.el7.x86_64.rpm krb5-server-1.12.2-14.el7.x86_64.rpm krb5-server-ldap-1.12.2-14.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: krb5-1.12.2-14.el7.src.rpm
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-libs-1.12.2-14.el7.i686.rpm krb5-libs-1.12.2-14.el7.x86_64.rpm krb5-pkinit-1.12.2-14.el7.x86_64.rpm krb5-workstation-1.12.2-14.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-devel-1.12.2-14.el7.i686.rpm krb5-devel-1.12.2-14.el7.x86_64.rpm krb5-server-1.12.2-14.el7.x86_64.rpm krb5-server-ldap-1.12.2-14.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: krb5-1.12.2-14.el7.src.rpm
ppc64: krb5-debuginfo-1.12.2-14.el7.ppc.rpm krb5-debuginfo-1.12.2-14.el7.ppc64.rpm krb5-devel-1.12.2-14.el7.ppc.rpm krb5-devel-1.12.2-14.el7.ppc64.rpm krb5-libs-1.12.2-14.el7.ppc.rpm krb5-libs-1.12.2-14.el7.ppc64.rpm krb5-pkinit-1.12.2-14.el7.ppc64.rpm krb5-server-1.12.2-14.el7.ppc64.rpm krb5-server-ldap-1.12.2-14.el7.ppc64.rpm krb5-workstation-1.12.2-14.el7.ppc64.rpm
s390x: krb5-debuginfo-1.12.2-14.el7.s390.rpm krb5-debuginfo-1.12.2-14.el7.s390x.rpm krb5-devel-1.12.2-14.el7.s390.rpm krb5-devel-1.12.2-14.el7.s390x.rpm krb5-libs-1.12.2-14.el7.s390.rpm krb5-libs-1.12.2-14.el7.s390x.rpm krb5-pkinit-1.12.2-14.el7.s390x.rpm krb5-server-1.12.2-14.el7.s390x.rpm krb5-server-ldap-1.12.2-14.el7.s390x.rpm krb5-workstation-1.12.2-14.el7.s390x.rpm
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-devel-1.12.2-14.el7.i686.rpm krb5-devel-1.12.2-14.el7.x86_64.rpm krb5-libs-1.12.2-14.el7.i686.rpm krb5-libs-1.12.2-14.el7.x86_64.rpm krb5-pkinit-1.12.2-14.el7.x86_64.rpm krb5-server-1.12.2-14.el7.x86_64.rpm krb5-server-ldap-1.12.2-14.el7.x86_64.rpm krb5-workstation-1.12.2-14.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: krb5-1.12.2-14.el7.src.rpm
x86_64: krb5-debuginfo-1.12.2-14.el7.i686.rpm krb5-debuginfo-1.12.2-14.el7.x86_64.rpm krb5-devel-1.12.2-14.el7.i686.rpm krb5-devel-1.12.2-14.el7.x86_64.rpm krb5-libs-1.12.2-14.el7.i686.rpm krb5-libs-1.12.2-14.el7.x86_64.rpm krb5-pkinit-1.12.2-14.el7.x86_64.rpm krb5-server-1.12.2-14.el7.x86_64.rpm krb5-server-ldap-1.12.2-14.el7.x86_64.rpm krb5-workstation-1.12.2-14.el7.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/
- References:
https://access.redhat.com/security/cve/CVE-2014-4341 https://access.redhat.com/security/cve/CVE-2014-4342 https://access.redhat.com/security/cve/CVE-2014-4343 https://access.redhat.com/security/cve/CVE-2014-4344 https://access.redhat.com/security/cve/CVE-2014-4345 https://access.redhat.com/security/cve/CVE-2014-5352 https://access.redhat.com/security/cve/CVE-2014-5353 https://access.redhat.com/security/cve/CVE-2014-9421 https://access.redhat.com/security/cve/CVE-2014-9422 https://access.redhat.com/security/cve/CVE-2014-9423 https://access.redhat.com/security/updates/classification/#moderate
- Contact:
The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/
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-- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . 6) - i386, x86_64
It was found that if a KDC served multiple realms, certain requests could cause the setup_server_realm() function to dereference a NULL pointer. (CVE-2014-4343)
These updated krb5 packages also include several bug fixes. Space precludes documenting all of these changes in this advisory. Users are directed to the Red Hat Enterprise Linux 6.6 Technical Notes, linked to in the References section, for information on the most significant of these changes
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"data": "Double free vulnerability in the init_ctx_reselect function in the SPNEGO initiator in lib/gssapi/spnego/spnego_mech.c in MIT Kerberos 5 (aka krb5) 1.10.x through 1.12.x before 1.12.2 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via network traffic that appears to come from an intended acceptor, but specifies a security mechanism different from the one proposed by the initiator. MIT Kerberos 5 is prone to a remote denial-of-service vulnerability. \nAttackers can exploit this issue to cause a program to crash, resulting in denial-of-service conditions. \nVersions prior to Kerberos 5 1.12.2 are vulnerable. \n\nCVE-2014-4343\n\n An unauthenticated remote attacker with the ability to spoof packets\n appearing to be from a GSSAPI acceptor can cause a double-free\n condition in GSSAPI initiators (clients) which are using the SPNEGO\n mechanism, by returning a different underlying mechanism than was\n proposed by the initiator. \n\nCVE-2014-4344\n\n An unauthenticated or partially authenticated remote attacker can\n cause a NULL dereference and application crash during a SPNEGO\n negotiation by sending an empty token as the second or later context\n token from initiator to acceptor. \n\nFor the stable distribution (wheezy), these problems have been fixed in\nversion 1.10.1+dfsg-5+deb7u2. \n\nFor the unstable distribution (sid), these problems have been fixed in\nversion 1.12.1+dfsg-7. ==========================================================================\nUbuntu Security Notice USN-2310-1\nAugust 11, 2014\n\nkrb5 vulnerabilities\n==========================================================================\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 14.04 LTS\n- Ubuntu 12.04 LTS\n- Ubuntu 10.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in Kerberos. This issue only affected Ubuntu\n12.04 LTS. This\nissue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. This issue only affected\nUbuntu 10.04 LTS and Ubuntu 12.04 LTS. \nThis issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS. \n(CVE-2014-4344)\n\nTomas Kuthan and Greg Hudson discovered that the Kerberos kadmind daemon\nincorrectly handled buffers when used with the LDAP backend. (CVE-2014-4345)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 14.04 LTS:\n krb5-admin-server 1.12+dfsg-2ubuntu4.2\n krb5-kdc 1.12+dfsg-2ubuntu4.2\n krb5-kdc-ldap 1.12+dfsg-2ubuntu4.2\n krb5-otp 1.12+dfsg-2ubuntu4.2\n krb5-pkinit 1.12+dfsg-2ubuntu4.2\n krb5-user 1.12+dfsg-2ubuntu4.2\n libgssapi-krb5-2 1.12+dfsg-2ubuntu4.2\n libgssrpc4 1.12+dfsg-2ubuntu4.2\n libk5crypto3 1.12+dfsg-2ubuntu4.2\n libkadm5clnt-mit9 1.12+dfsg-2ubuntu4.2\n libkadm5srv-mit9 1.12+dfsg-2ubuntu4.2\n libkdb5-7 1.12+dfsg-2ubuntu4.2\n libkrad0 1.12+dfsg-2ubuntu4.2\n libkrb5-3 1.12+dfsg-2ubuntu4.2\n libkrb5support0 1.12+dfsg-2ubuntu4.2\n\nUbuntu 12.04 LTS:\n krb5-admin-server 1.10+dfsg~beta1-2ubuntu0.5\n krb5-kdc 1.10+dfsg~beta1-2ubuntu0.5\n krb5-kdc-ldap 1.10+dfsg~beta1-2ubuntu0.5\n krb5-pkinit 1.10+dfsg~beta1-2ubuntu0.5\n krb5-user 1.10+dfsg~beta1-2ubuntu0.5\n libgssapi-krb5-2 1.10+dfsg~beta1-2ubuntu0.5\n libgssrpc4 1.10+dfsg~beta1-2ubuntu0.5\n libk5crypto3 1.10+dfsg~beta1-2ubuntu0.5\n libkadm5clnt-mit8 1.10+dfsg~beta1-2ubuntu0.5\n libkadm5srv-mit8 1.10+dfsg~beta1-2ubuntu0.5\n libkdb5-6 1.10+dfsg~beta1-2ubuntu0.5\n libkrb5-3 1.10+dfsg~beta1-2ubuntu0.5\n libkrb5support0 1.10+dfsg~beta1-2ubuntu0.5\n\nUbuntu 10.04 LTS:\n krb5-admin-server 1.8.1+dfsg-2ubuntu0.13\n krb5-kdc 1.8.1+dfsg-2ubuntu0.13\n krb5-kdc-ldap 1.8.1+dfsg-2ubuntu0.13\n krb5-pkinit 1.8.1+dfsg-2ubuntu0.13\n krb5-user 1.8.1+dfsg-2ubuntu0.13\n libgssapi-krb5-2 1.8.1+dfsg-2ubuntu0.13\n libgssrpc4 1.8.1+dfsg-2ubuntu0.13\n libk5crypto3 1.8.1+dfsg-2ubuntu0.13\n libkadm5clnt-mit7 1.8.1+dfsg-2ubuntu0.13\n libkadm5srv-mit7 1.8.1+dfsg-2ubuntu0.13\n libkdb5-4 1.8.1+dfsg-2ubuntu0.13\n libkrb5-3 1.8.1+dfsg-2ubuntu0.13\n libkrb5support0 1.8.1+dfsg-2ubuntu0.13\n\nIn general, a standard system update will make all the necessary changes. \n\nAffected packages\n=================\n\n -------------------------------------------------------------------\n Package / Vulnerable / Unaffected\n -------------------------------------------------------------------\n 1 app-crypt/mit-krb5 \u003c 1.13 \u003e= 1.13 \n\nDescription\n===========\n\nMultiple vulnerabilities have been discovered in MIT Kerberos 5. Please\nreview the CVE identifiers referenced below for details. \n\nWorkaround\n==========\n\nThere is no known workaround at this time. \n\nResolution\n==========\n\nAll MIT Kerberos 5 users should upgrade to the latest version:\n\n # emerge --sync\n # emerge --ask --oneshot --verbose \"\u003e=app-crypt/mit-krb5-1.13\"\n\nReferences\n==========\n\n[ 1 ] CVE-2014-4341\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4341\n[ 2 ] CVE-2014-4343\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4343\n[ 3 ] CVE-2014-4345\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-4345\n[ 4 ] CVE-2014-5351\n http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-5351\n\nAvailability\n============\n\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n http://security.gentoo.org/glsa/glsa-201412-53.xml\n\nConcerns?\n=========\n\nSecurity is a primary focus of Gentoo Linux and ensuring the\nconfidentiality and security of our users\u0027 machines is of utmost\nimportance to us. Any security concerns should be addressed to\nsecurity@gentoo.org or alternatively, you may file a bug at\nhttps://bugs.gentoo.org. \n\nLicense\n=======\n\nCopyright 2014 Gentoo Foundation, Inc; referenced text\nbelongs to its owner(s). \n\nThe contents of this document are licensed under the\nCreative Commons - Attribution / Share Alike license. \n\nhttp://creativecommons.org/licenses/by-sa/2.5\n\n\n. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\n=====================================================================\n Red Hat Security Advisory\n\nSynopsis: Moderate: krb5 security, bug fix and enhancement update\nAdvisory ID: RHSA-2015:0439-01\nProduct: Red Hat Enterprise Linux\nAdvisory URL: https://rhn.redhat.com/errata/RHSA-2015-0439.html\nIssue date: 2015-03-05\nCVE Names: CVE-2014-4341 CVE-2014-4342 CVE-2014-4343 \n CVE-2014-4344 CVE-2014-4345 CVE-2014-5352 \n CVE-2014-5353 CVE-2014-9421 CVE-2014-9422 \n CVE-2014-9423 \n=====================================================================\n\n1. Summary:\n\nUpdated krb5 packages that fix multiple security issues, several bugs, and\nadd various enhancements are now available for Red Hat Enterprise Linux 7. \n\nRed Hat Product Security has rated this update as having Moderate security\nimpact. Common Vulnerability Scoring System (CVSS) base scores, which give\ndetailed severity ratings, are available for each vulnerability from the\nCVE links in the References section. \n\nKerberos is a networked authentication system which allows clients and\nservers to authenticate to each other with the help of a trusted third\nparty, the Kerberos KDC. \n\n2. Relevant releases/architectures:\n\nRed Hat Enterprise Linux Client (v. 7) - x86_64\nRed Hat Enterprise Linux Client Optional (v. 7) - x86_64\nRed Hat Enterprise Linux ComputeNode (v. 7) - x86_64\nRed Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64\nRed Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64\nRed Hat Enterprise Linux Workstation (v. 7) - x86_64\n\n3. Description:\n\nA NULL pointer dereference flaw was found in the MIT Kerberos SPNEGO\nacceptor for continuation tokens. A remote, unauthenticated attacker could\nuse this flaw to crash a GSSAPI-enabled server application. (CVE-2014-4344)\n\nA buffer overflow was found in the KADM5 administration server (kadmind)\nwhen it was used with an LDAP back end for the KDC database. A remote,\nauthenticated attacker could potentially use this flaw to execute arbitrary\ncode on the system running kadmind. (CVE-2014-4345)\n\nA use-after-free flaw was found in the way the MIT Kerberos libgssapi_krb5\nlibrary processed valid context deletion tokens. An attacker able to make\nan application using the GSS-API library (libgssapi) call the\ngss_process_context_token() function could use this flaw to crash that\napplication. (CVE-2014-5352)\n\nIf kadmind were used with an LDAP back end for the KDC database, a remote,\nauthenticated attacker with the permissions to set the password policy\ncould crash kadmind by attempting to use a named ticket policy object as a\npassword policy for a principal. (CVE-2014-5353)\n\nA double-free flaw was found in the way MIT Kerberos handled invalid\nExternal Data Representation (XDR) data. An authenticated user could use\nthis flaw to crash the MIT Kerberos administration server (kadmind), or\nother applications using Kerberos libraries, using specially crafted XDR\npackets. (CVE-2014-9421)\n\nIt was found that the MIT Kerberos administration server (kadmind)\nincorrectly accepted certain authentication requests for two-component\nserver principal names. A remote attacker able to acquire a key with a\nparticularly named principal (such as \"kad/x\") could use this flaw to\nimpersonate any user to kadmind, and perform administrative actions as that\nuser. (CVE-2014-9422)\n\nAn information disclosure flaw was found in the way MIT Kerberos RPCSEC_GSS\nimplementation (libgssrpc) handled certain requests. An attacker could send\na specially crafted request to an application using libgssrpc to disclose a\nlimited portion of uninitialized memory used by that application. \n(CVE-2014-9423)\n\nTwo buffer over-read flaws were found in the way MIT Kerberos handled\ncertain requests. A remote, unauthenticated attacker able to inject packets\ninto a client or server application\u0027s GSSAPI session could use either of\nthese flaws to crash the application. An\nattacker able to spoof packets to appear as though they are from an GSSAPI\nacceptor could use this flaw to crash a client application that uses MIT\nKerberos. (CVE-2014-4343)\n\nRed Hat would like to thank the MIT Kerberos project for reporting the\nCVE-2014-5352, CVE-2014-9421, CVE-2014-9422, and CVE-2014-9423 issues. MIT\nKerberos project acknowledges Nico Williams for helping with the analysis\nof CVE-2014-5352. \n\nThe krb5 packages have been upgraded to upstream version 1.12, which\nprovides a number of bug fixes and enhancements, including:\n\n* Added plug-in interfaces for principal-to-username mapping and verifying\nauthorization to user accounts. \n\n* When communicating with a KDC over a connected TCP or HTTPS socket, the\nclient gives the KDC more time to reply before it transmits the request to\nanother server. (BZ#1049709, BZ#1127995)\n\nThis update also fixes multiple bugs, for example:\n\n* The Kerberos client library did not recognize certain exit statuses that\nthe resolver libraries could return when looking up the addresses of\nservers configured in the /etc/krb5.conf file or locating Kerberos servers\nusing DNS service location. The library could treat non-fatal return codes\nas fatal errors. Now, the library interprets the specific return codes\ncorrectly. (BZ#1084068, BZ#1109102)\n\nIn addition, this update adds various enhancements. Among others:\n\n* Added support for contacting KDCs and kpasswd servers through HTTPS\nproxies implementing the Kerberos KDC Proxy (KKDCP) protocol. (BZ#1109919)\n\n4. Solution:\n\nAll krb5 users are advised to upgrade to these updated packages, which\ncorrect these issues and add these enhancements. \n\nBefore applying this update, make sure all previously released errata\nrelevant to your system have been applied. \n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258\n\n5. Bugs fixed (https://bugzilla.redhat.com/):\n\n1084068 - ipv6 address handling in krb5.conf\n1102837 - Please backport improved GSSAPI mech configuration\n1109102 - Kerberos does not handle incorrect Active Directory DNS SRV entries correctly\n1109919 - Backport https support into libkrb5\n1116180 - CVE-2014-4341 krb5: denial of service flaws when handling padding length longer than the plaintext\n1118347 - ksu non-functional, gets invalid argument copying cred cache\n1120581 - CVE-2014-4342 krb5: denial of service flaws when handling RFC 1964 tokens\n1121789 - CVE-2014-4343: use-after-free crash in SPNEGO\n1121876 - CVE-2014-4343 krb5: double-free flaw in SPNEGO initiators\n1121877 - CVE-2014-4344 krb5: NULL pointer dereference flaw in SPNEGO acceptor for continuation tokens\n1127995 - aggressive kinit timeout causes AS_REQ resent and subsequent OTP auth failure\n1128157 - CVE-2014-4345 krb5: buffer overrun in kadmind with LDAP backend (MITKRB5-SA-2014-001)\n1166012 - libkadmclnt SONAME change (8 to 9) in krb5 1.12 update\n1174543 - CVE-2014-5353 krb5: NULL pointer dereference when using a ticket policy name as a password policy name\n1179856 - CVE-2014-5352 krb5: gss_process_context_token() incorrectly frees context (MITKRB5-SA-2015-001)\n1179857 - CVE-2014-9421 krb5: kadmind doubly frees partial deserialization results (MITKRB5-SA-2015-001)\n1179861 - CVE-2014-9422 krb5: kadmind incorrectly validates server principal name (MITKRB5-SA-2015-001)\n1179863 - CVE-2014-9423 krb5: libgssrpc server applications leak uninitialized bytes (MITKRB5-SA-2015-001)\n1184629 - kinit loops on principals on unknown error\n\n6. Package List:\n\nRed Hat Enterprise Linux Client (v. 7):\n\nSource:\nkrb5-1.12.2-14.el7.src.rpm\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-libs-1.12.2-14.el7.i686.rpm\nkrb5-libs-1.12.2-14.el7.x86_64.rpm\nkrb5-pkinit-1.12.2-14.el7.x86_64.rpm\nkrb5-workstation-1.12.2-14.el7.x86_64.rpm\n\nRed Hat Enterprise Linux Client Optional (v. 7):\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-devel-1.12.2-14.el7.i686.rpm\nkrb5-devel-1.12.2-14.el7.x86_64.rpm\nkrb5-server-1.12.2-14.el7.x86_64.rpm\nkrb5-server-ldap-1.12.2-14.el7.x86_64.rpm\n\nRed Hat Enterprise Linux ComputeNode (v. 7):\n\nSource:\nkrb5-1.12.2-14.el7.src.rpm\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-libs-1.12.2-14.el7.i686.rpm\nkrb5-libs-1.12.2-14.el7.x86_64.rpm\nkrb5-pkinit-1.12.2-14.el7.x86_64.rpm\nkrb5-workstation-1.12.2-14.el7.x86_64.rpm\n\nRed Hat Enterprise Linux ComputeNode Optional (v. 7):\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-devel-1.12.2-14.el7.i686.rpm\nkrb5-devel-1.12.2-14.el7.x86_64.rpm\nkrb5-server-1.12.2-14.el7.x86_64.rpm\nkrb5-server-ldap-1.12.2-14.el7.x86_64.rpm\n\nRed Hat Enterprise Linux Server (v. 7):\n\nSource:\nkrb5-1.12.2-14.el7.src.rpm\n\nppc64:\nkrb5-debuginfo-1.12.2-14.el7.ppc.rpm\nkrb5-debuginfo-1.12.2-14.el7.ppc64.rpm\nkrb5-devel-1.12.2-14.el7.ppc.rpm\nkrb5-devel-1.12.2-14.el7.ppc64.rpm\nkrb5-libs-1.12.2-14.el7.ppc.rpm\nkrb5-libs-1.12.2-14.el7.ppc64.rpm\nkrb5-pkinit-1.12.2-14.el7.ppc64.rpm\nkrb5-server-1.12.2-14.el7.ppc64.rpm\nkrb5-server-ldap-1.12.2-14.el7.ppc64.rpm\nkrb5-workstation-1.12.2-14.el7.ppc64.rpm\n\ns390x:\nkrb5-debuginfo-1.12.2-14.el7.s390.rpm\nkrb5-debuginfo-1.12.2-14.el7.s390x.rpm\nkrb5-devel-1.12.2-14.el7.s390.rpm\nkrb5-devel-1.12.2-14.el7.s390x.rpm\nkrb5-libs-1.12.2-14.el7.s390.rpm\nkrb5-libs-1.12.2-14.el7.s390x.rpm\nkrb5-pkinit-1.12.2-14.el7.s390x.rpm\nkrb5-server-1.12.2-14.el7.s390x.rpm\nkrb5-server-ldap-1.12.2-14.el7.s390x.rpm\nkrb5-workstation-1.12.2-14.el7.s390x.rpm\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-devel-1.12.2-14.el7.i686.rpm\nkrb5-devel-1.12.2-14.el7.x86_64.rpm\nkrb5-libs-1.12.2-14.el7.i686.rpm\nkrb5-libs-1.12.2-14.el7.x86_64.rpm\nkrb5-pkinit-1.12.2-14.el7.x86_64.rpm\nkrb5-server-1.12.2-14.el7.x86_64.rpm\nkrb5-server-ldap-1.12.2-14.el7.x86_64.rpm\nkrb5-workstation-1.12.2-14.el7.x86_64.rpm\n\nRed Hat Enterprise Linux Workstation (v. 7):\n\nSource:\nkrb5-1.12.2-14.el7.src.rpm\n\nx86_64:\nkrb5-debuginfo-1.12.2-14.el7.i686.rpm\nkrb5-debuginfo-1.12.2-14.el7.x86_64.rpm\nkrb5-devel-1.12.2-14.el7.i686.rpm\nkrb5-devel-1.12.2-14.el7.x86_64.rpm\nkrb5-libs-1.12.2-14.el7.i686.rpm\nkrb5-libs-1.12.2-14.el7.x86_64.rpm\nkrb5-pkinit-1.12.2-14.el7.x86_64.rpm\nkrb5-server-1.12.2-14.el7.x86_64.rpm\nkrb5-server-ldap-1.12.2-14.el7.x86_64.rpm\nkrb5-workstation-1.12.2-14.el7.x86_64.rpm\n\nThese packages are GPG signed by Red Hat for security. Our key and\ndetails on how to verify the signature are available from\nhttps://access.redhat.com/security/team/key/\n\n7. References:\n\nhttps://access.redhat.com/security/cve/CVE-2014-4341\nhttps://access.redhat.com/security/cve/CVE-2014-4342\nhttps://access.redhat.com/security/cve/CVE-2014-4343\nhttps://access.redhat.com/security/cve/CVE-2014-4344\nhttps://access.redhat.com/security/cve/CVE-2014-4345\nhttps://access.redhat.com/security/cve/CVE-2014-5352\nhttps://access.redhat.com/security/cve/CVE-2014-5353\nhttps://access.redhat.com/security/cve/CVE-2014-9421\nhttps://access.redhat.com/security/cve/CVE-2014-9422\nhttps://access.redhat.com/security/cve/CVE-2014-9423\nhttps://access.redhat.com/security/updates/classification/#moderate\n\n8. Contact:\n\nThe Red Hat security contact is \u003csecalert@redhat.com\u003e. More contact\ndetails at https://access.redhat.com/security/team/contact/\n\nCopyright 2015 Red Hat, Inc. \n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1\n\niD8DBQFU+GoxXlSAg2UNWIIRAtkZAJ9PYyHLsR1t+YWgqw4jb4XTtX8iuACgkxfi\ngZD8EL2lSaLXnIQxca8zLTg=\n=aK0y\n-----END PGP SIGNATURE-----\n\n\n--\nRHSA-announce mailing list\nRHSA-announce@redhat.com\nhttps://www.redhat.com/mailman/listinfo/rhsa-announce\n. 6) - i386, x86_64\n\n3. \n\nIt was found that if a KDC served multiple realms, certain requests could\ncause the setup_server_realm() function to dereference a NULL pointer. (CVE-2014-4343)\n\nThese updated krb5 packages also include several bug fixes. Space precludes\ndocumenting all of these changes in this advisory. Users are directed to\nthe Red Hat Enterprise Linux 6.6 Technical Notes, linked to in the\nReferences section, for information on the most significant of these\nchanges",
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.