VAR-201705-3789

Vulnerability from variot - Updated: 2023-12-18 11:37

In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions extract_l3_ipv6, extract_l4_tcp, and extract_l4_udp that can be triggered remotely. Open vSwitch (OvS) Contains a buffer error vulnerability.Information is acquired, information is acquired, information is altered, and service operation is interrupted (DoS) There is a possibility of being put into a state. Open vSwitch is prone to the following multiple security vulnerabilities: 1. Multiple buffer-overflow vulnerabilities 2. A denial-of-service vulnerability An attacker can exploit these issues to execute arbitrary code in the context of the vulnerable application. Failed exploit attempts will likely result in denial-of-service conditions. Open vSwitch (OvS) is a multi-layer virtual switch product based on open source technology (according to the Apache2.0 license). It supports large-scale network automation, standard management interfaces and protocols, etc. through programming extensions. The 'extract_l3_ipv6', 'extract_l4_tcp' and 'extract_l4_udp' functions of the lib/conntrack.c file in the firewall implementation process of OvS 2.6.1 version have security vulnerabilities. ========================================================================== Ubuntu Security Notice USN-3450-1 October 11, 2017

openvswitch vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Open vSwitch.

Software Description: - openvswitch: Ethernet virtual switch

Details:

Bhargava Shastry discovered that Open vSwitch incorrectly handled certain OFP messages. (CVE-2017-9214)

It was discovered that Open vSwitch incorrectly handled certain OpenFlow role messages. (CVE-2017-9263)

It was discovered that Open vSwitch incorrectly handled certain malformed packets. This issue only affected Ubuntu 17.04. (CVE-2017-9265)

Update instructions:

The problem can be corrected by updating your system to the following package versions:

Ubuntu 17.04: openvswitch-common 2.6.1-0ubuntu5.1

Ubuntu 16.04 LTS: openvswitch-common 2.5.2-0ubuntu0.16.04.2

In general, a standard system update will make all the necessary changes. 1473735 - ovs-vswitchd crashes with SIGSEGV randomly when adding/removing interfaces

  1. X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 03 Aug 2017 12:39:24 +0000 (UTC)

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

===================================================================== Red Hat Security Advisory

Synopsis: Moderate: openvswitch security, bug fix, and enhancement update Advisory ID: RHSA-2017:2418-01 Product: Fast Datapath Advisory URL: https://access.redhat.com/errata/RHSA-2017:2418 Issue date: 2017-08-03 CVE Names: CVE-2017-9214 CVE-2017-9263 CVE-2017-9264 CVE-2017-9265 =====================================================================

  1. Summary:

An update for openvswitch is now available for Fast Datapath for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

  1. Relevant releases/architectures:

Channel to provide early releases to layered products - noarch, x86_64

  1. Description:

Open vSwitch provides standard network bridging functions and support for the OpenFlow protocol for remote per-flow control of traffic.

The following packages have been upgraded to a later upstream version: openvswitch (2.7.2). (BZ#1472854)

Security Fix(es):

  • An unsigned int wrap around leading to a buffer over-read was found when parsing OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch (OvS). An attacker could use this flaw to cause a remote DoS. (CVE-2017-9214)

  • In Open vSwitch (OvS), while parsing an OpenFlow role status message there is a call to the abort() function for undefined role status reasons in the function ofp_print_role_status_message in lib/ofp-print.c that may be leveraged toward a remote DoS attack by a malicious switch. A remote attack could use this flaw to cause a Denial of Service (DoS). (CVE-2017-9264)

  • A buffer over-read flaw was found in Open vSwitch (OvS) while parsing the group mod OpenFlow messages sent from the controller. An attacker could use this flaw to cause a Denial of Service (DoS). (CVE-2017-9265)

  • Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

  1. Package List:

Channel to provide early releases to layered products:

Source: openvswitch-2.7.2-1.git20170719.el7fdp.src.rpm

noarch: openvswitch-test-2.7.2-1.git20170719.el7fdp.noarch.rpm python-openvswitch-2.7.2-1.git20170719.el7fdp.noarch.rpm

x86_64: openvswitch-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-debuginfo-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-devel-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-ovn-central-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-ovn-common-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-ovn-docker-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-ovn-host-2.7.2-1.git20170719.el7fdp.x86_64.rpm openvswitch-ovn-vtep-2.7.2-1.git20170719.el7fdp.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/

  1. References:

https://access.redhat.com/security/cve/CVE-2017-9214 https://access.redhat.com/security/cve/CVE-2017-9263 https://access.redhat.com/security/cve/CVE-2017-9264 https://access.redhat.com/security/cve/CVE-2017-9265 https://access.redhat.com/security/updates/classification/#moderate

  1. Contact:

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1

iD8DBQFZgxmYXlSAg2UNWIIRAuzuAJ9Dngapo5j66itwFnpsvl92GKMAywCfb2Ah V7og7GgSn4a1oFzQjIZHeXk= =qOi+ -----END PGP SIGNATURE-----

-- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce

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    "data": "In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions `extract_l3_ipv6`, `extract_l4_tcp`, and `extract_l4_udp` that can be triggered remotely. Open vSwitch (OvS) Contains a buffer error vulnerability.Information is acquired, information is acquired, information is altered, and service operation is interrupted (DoS) There is a possibility of being put into a state. Open vSwitch is prone to the following multiple security vulnerabilities:\n1. Multiple buffer-overflow vulnerabilities\n2. A denial-of-service vulnerability\nAn attacker can exploit these issues to execute arbitrary code in the context of the vulnerable application. Failed exploit attempts will likely result in denial-of-service conditions. Open vSwitch (OvS) is a multi-layer virtual switch product based on open source technology (according to the Apache2.0 license). It supports large-scale network automation, standard management interfaces and protocols, etc. through programming extensions. The \u0027extract_l3_ipv6\u0027, \u0027extract_l4_tcp\u0027 and \u0027extract_l4_udp\u0027 functions of the lib/conntrack.c file in the firewall implementation process of OvS 2.6.1 version have security vulnerabilities. ==========================================================================\nUbuntu Security Notice USN-3450-1\nOctober 11, 2017\n\nopenvswitch vulnerabilities\n==========================================================================\n\nA security issue affects these releases of Ubuntu and its derivatives:\n\n- Ubuntu 17.04\n- Ubuntu 16.04 LTS\n\nSummary:\n\nSeveral security issues were fixed in Open vSwitch. \n\nSoftware Description:\n- openvswitch: Ethernet virtual switch\n\nDetails:\n\nBhargava Shastry discovered that Open vSwitch incorrectly handled certain\nOFP messages. (CVE-2017-9214)\n\nIt was discovered that Open vSwitch incorrectly handled certain OpenFlow\nrole messages. (CVE-2017-9263)\n\nIt was discovered that Open vSwitch incorrectly handled certain malformed\npackets. This issue only\naffected Ubuntu 17.04. (CVE-2017-9265)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 17.04:\n  openvswitch-common              2.6.1-0ubuntu5.1\n\nUbuntu 16.04 LTS:\n  openvswitch-common              2.5.2-0ubuntu0.16.04.2\n\nIn general, a standard system update will make all the necessary changes. \n1473735 - ovs-vswitchd crashes with SIGSEGV randomly when adding/removing interfaces\n\n6. X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11\nX-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Thu, 03 Aug 2017 12:39:24 +0000 (UTC)\n\n\n-----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA1\n\n=====================================================================\n                   Red Hat Security Advisory\n\nSynopsis:          Moderate: openvswitch security, bug fix, and enhancement update\nAdvisory ID:       RHSA-2017:2418-01\nProduct:           Fast Datapath\nAdvisory URL:      https://access.redhat.com/errata/RHSA-2017:2418\nIssue date:        2017-08-03\nCVE Names:         CVE-2017-9214 CVE-2017-9263 CVE-2017-9264 \n                   CVE-2017-9265 \n=====================================================================\n\n1. Summary:\n\nAn update for openvswitch is now available for Fast Datapath for Red Hat\nEnterprise Linux 7. \n\nRed Hat Product Security has rated this update as having a security impact\nof Moderate. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available for each vulnerability from\nthe CVE link(s) in the References section. \n\n2. Relevant releases/architectures:\n\nChannel to provide early releases to layered products - noarch, x86_64\n\n3. Description:\n\nOpen vSwitch provides standard network bridging functions and support for\nthe OpenFlow protocol for remote per-flow control of traffic. \n\nThe following packages have been upgraded to a later upstream version:\nopenvswitch (2.7.2). (BZ#1472854)\n\nSecurity Fix(es):\n\n* An unsigned int wrap around leading to a buffer over-read was found when\nparsing OFPT_QUEUE_GET_CONFIG_REPLY messages in Open vSwitch (OvS). An\nattacker could use this flaw to cause a remote DoS. (CVE-2017-9214)\n\n* In Open vSwitch (OvS), while parsing an OpenFlow role status message\nthere is a call to the abort() function for undefined role status reasons\nin the function `ofp_print_role_status_message` in `lib/ofp-print.c` that\nmay be leveraged toward a remote DoS attack by a malicious switch. A remote attack could use this flaw to cause a\nDenial of Service (DoS). (CVE-2017-9264)\n\n* A buffer over-read flaw was found in Open vSwitch (OvS) while parsing the\ngroup mod OpenFlow messages sent from the controller. An attacker could use\nthis flaw to cause a Denial of Service (DoS). (CVE-2017-9265)\n\n4. Solution:\n\nFor details on how to apply this update, which includes the changes\ndescribed in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\n5. Package List:\n\nChannel to provide early releases to layered products:\n\nSource:\nopenvswitch-2.7.2-1.git20170719.el7fdp.src.rpm\n\nnoarch:\nopenvswitch-test-2.7.2-1.git20170719.el7fdp.noarch.rpm\npython-openvswitch-2.7.2-1.git20170719.el7fdp.noarch.rpm\n\nx86_64:\nopenvswitch-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-debuginfo-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-devel-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-ovn-central-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-ovn-common-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-ovn-docker-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-ovn-host-2.7.2-1.git20170719.el7fdp.x86_64.rpm\nopenvswitch-ovn-vtep-2.7.2-1.git20170719.el7fdp.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-2017-9214\nhttps://access.redhat.com/security/cve/CVE-2017-9263\nhttps://access.redhat.com/security/cve/CVE-2017-9264\nhttps://access.redhat.com/security/cve/CVE-2017-9265\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 2017 Red Hat, Inc. \n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1\n\niD8DBQFZgxmYXlSAg2UNWIIRAuzuAJ9Dngapo5j66itwFnpsvl92GKMAywCfb2Ah\nV7og7GgSn4a1oFzQjIZHeXk=\n=qOi+\n-----END PGP SIGNATURE-----\n\n--\nRHSA-announce mailing list\nRHSA-announce@redhat.com\nhttps://www.redhat.com/mailman/listinfo/rhsa-announce\n",
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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.