var-202004-0464
Vulnerability from variot
An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour. Xen There is an unspecified vulnerability in.Service operation interruption (DoS) It may be put into a state. Xen is an open source virtual machine monitor product from the University of Cambridge. The product enables different and incompatible operating systems to run on the same computer and supports migration during runtime to ensure normal operation and avoid downtime.
There are security vulnerabilities in Xen 4.13.x and previous versions. An attacker can use this vulnerability to cause a denial of service. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202005-08
https://security.gentoo.org/
Severity: Normal Title: Xen: Multiple vulnerabilities Date: May 14, 2020 Bugs: #717446 ID: 202005-08
Synopsis
Multiple vulnerabilities have been found in Xen, the worst of which could allow privilege escalation.
Background
Xen is a bare-metal hypervisor.
Affected packages
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 app-emulation/xen < 4.12.2-r2 >= 4.12.2-r2 2 app-emulation/xen-tools < 4.12.2-r2 >= 4.12.2-r2 ------------------------------------------------------------------- 2 affected packages
Description
Multiple vulnerabilities have been discovered in Xen. Please review the CVE identifiers referenced below for details.
Impact
Please review the referenced CVE identifiers for details.
Workaround
There is no known workaround at this time.
Resolution
All Xen users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.12.2-r2"
References
[ 1 ] CVE-2020-11739 https://nvd.nist.gov/vuln/detail/CVE-2020-11739 [ 2 ] CVE-2020-11740 https://nvd.nist.gov/vuln/detail/CVE-2020-11740 [ 3 ] CVE-2020-11741 https://nvd.nist.gov/vuln/detail/CVE-2020-11741 [ 4 ] CVE-2020-11742 https://nvd.nist.gov/vuln/detail/CVE-2020-11742 [ 5 ] CVE-2020-11743 https://nvd.nist.gov/vuln/detail/CVE-2020-11743
Availability
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
https://security.gentoo.org/glsa/202005-08
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 2020 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.
https://creativecommons.org/licenses/by-sa/2.5 .
For the stable distribution (buster), these problems have been fixed in version 4.11.4+24-gddaaccbbab-1~deb10u1.
We recommend that you upgrade your xen packages.
For the detailed security status of xen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xen
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE-----
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Software Description: - xen: Public headers and libs for Xen
Details:
It was discovered that memory contents previously stored in microarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY read operations on Intel client and Xeon E3 processors may be briefly exposed to processes on the same or different processor cores. (CVE-2020-0543)
Julien Grall discovered that Xen incorrectly handled memory barriers on ARM-based systems. (CVE-2020-11739)
Ilja Van Sprundel discovered that Xen incorrectly handled profiling of guests. (CVE-2020-11740, CVE-2020-11741)
It was discovered that Xen incorrectly handled grant tables. (CVE-2020-11742, CVE-2020-11743)
Jan Beulich discovered that Xen incorrectly handled certain code paths. (CVE-2020-15563)
Julien Grall discovered that Xen incorrectly verified memory addresses provided by the guest on ARM-based systems. (CVE-2020-15564)
Roger Pau Monn\xe9 discovered that Xen incorrectly handled caching on x86 Intel systems. (CVE-2020-15565)
It was discovered that Xen incorrectly handled error in event-channel port allocation. (CVE-2020-15566)
Jan Beulich discovered that Xen incorrectly handled certain EPT (Extended Page Tables). (CVE-2020-15567)
Andrew Cooper discovered that Xen incorrectly handled PCI passthrough. (CVE-2020-25595)
Andrew Cooper discovered that Xen incorrectly sanitized path injections. (CVE-2020-25596)
Jan Beulich discovered that Xen incorrectly handled validation of event channels. (CVE-2020-25597)
Julien Grall and Jan Beulich discovered that Xen incorrectly handled resetting event channels. (CVE-2020-25599)
Julien Grall discovered that Xen incorrectly handled event channels memory allocation on 32-bits domains. (CVE-2020-25600)
Jan Beulich discovered that Xen incorrectly handled resetting or cleaning up event channels. (CVE-2020-25601)
Andrew Cooper discovered that Xen incorrectly handled certain Intel specific MSR (Model Specific Registers). (CVE-2020-25602)
Julien Grall discovered that Xen incorrectly handled accessing/allocating event channels. (CVE-2020-25603)
Igor Druzhinin discovered that Xen incorrectly handled locks. (CVE-2020-25604)
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 20.04 LTS: libxendevicemodel1 4.11.3+24-g14b62ab3e5-1ubuntu2.3 libxenevtchn1 4.11.3+24-g14b62ab3e5-1ubuntu2.3 libxengnttab1 4.11.3+24-g14b62ab3e5-1ubuntu2.3 libxenmisc4.11 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xen-hypervisor-4.11-amd64 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xen-hypervisor-4.11-arm64 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xen-hypervisor-4.11-armhf 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xen-utils-4.11 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xen-utils-common 4.11.3+24-g14b62ab3e5-1ubuntu2.3 xenstore-utils 4.11.3+24-g14b62ab3e5-1ubuntu2.3
After a standard system update you need to reboot your computer to make all the necessary changes.
References: https://ubuntu.com/security/notices/USN-5617-1 CVE-2020-0543, CVE-2020-11739, CVE-2020-11740, CVE-2020-11741, CVE-2020-11742, CVE-2020-11743, CVE-2020-15563, CVE-2020-15564, CVE-2020-15565, CVE-2020-15566, CVE-2020-15567, CVE-2020-25595, CVE-2020-25596, CVE-2020-25597, CVE-2020-25599, CVE-2020-25600, CVE-2020-25601, CVE-2020-25602, CVE-2020-25603, CVE-2020-25604
Package Information: https://launchpad.net/ubuntu/+source/xen/4.11.3+24-g14b62ab3e5-1ubuntu2.3
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"data": "An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of bad continuation handling in GNTTABOP_copy. Grant table operations are expected to return 0 for success, and a negative number for errors. The fix for CVE-2017-12135 introduced a path through grant copy handling where success may be returned to the caller without any action taken. In particular, the status fields of individual operations are left uninitialised, and may result in errant behaviour in the caller of GNTTABOP_copy. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to copy a grant, it hits the incorrect exit path. This returns success to the caller without doing anything, which may cause crashes or other incorrect behaviour. Xen There is an unspecified vulnerability in.Service operation interruption (DoS) It may be put into a state. Xen is an open source virtual machine monitor product from the University of Cambridge. The product enables different and incompatible operating systems to run on the same computer and supports migration during runtime to ensure normal operation and avoid downtime. \n\r\n\r\nThere are security vulnerabilities in Xen 4.13.x and previous versions. An attacker can use this vulnerability to cause a denial of service. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\nGentoo Linux Security Advisory GLSA 202005-08\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n https://security.gentoo.org/\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\n Severity: Normal\n Title: Xen: Multiple vulnerabilities\n Date: May 14, 2020\n Bugs: #717446\n ID: 202005-08\n\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\n\nSynopsis\n========\n\nMultiple vulnerabilities have been found in Xen, the worst of which\ncould allow privilege escalation. \n\nBackground\n==========\n\nXen is a bare-metal hypervisor. \n\nAffected packages\n=================\n\n -------------------------------------------------------------------\n Package / Vulnerable / Unaffected\n -------------------------------------------------------------------\n 1 app-emulation/xen \u003c 4.12.2-r2 \u003e= 4.12.2-r2\n 2 app-emulation/xen-tools \u003c 4.12.2-r2 \u003e= 4.12.2-r2\n -------------------------------------------------------------------\n 2 affected packages\n\nDescription\n===========\n\nMultiple vulnerabilities have been discovered in Xen. Please review the\nCVE identifiers referenced below for details. \n\nImpact\n======\n\nPlease review the referenced CVE identifiers for details. \n\nWorkaround\n==========\n\nThere is no known workaround at this time. \n\nResolution\n==========\n\nAll Xen users should upgrade to the latest version:\n\n # emerge --sync\n # emerge --ask --oneshot --verbose \"\u003e=app-emulation/xen-4.12.2-r2\"\n\nReferences\n==========\n\n[ 1 ] CVE-2020-11739\n https://nvd.nist.gov/vuln/detail/CVE-2020-11739\n[ 2 ] CVE-2020-11740\n https://nvd.nist.gov/vuln/detail/CVE-2020-11740\n[ 3 ] CVE-2020-11741\n https://nvd.nist.gov/vuln/detail/CVE-2020-11741\n[ 4 ] CVE-2020-11742\n https://nvd.nist.gov/vuln/detail/CVE-2020-11742\n[ 5 ] CVE-2020-11743\n https://nvd.nist.gov/vuln/detail/CVE-2020-11743\n\nAvailability\n============\n\nThis GLSA and any updates to it are available for viewing at\nthe Gentoo Security Website:\n\n https://security.gentoo.org/glsa/202005-08\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 2020 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\nhttps://creativecommons.org/licenses/by-sa/2.5\n. \n \nFor the stable distribution (buster), these problems have been fixed in\nversion 4.11.4+24-gddaaccbbab-1~deb10u1. \n\nWe recommend that you upgrade your xen packages. \n\nFor the detailed security status of xen please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/xen\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org\n-----BEGIN PGP SIGNATURE-----\n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\ng8OhDVMgrx5GM4rXSZ60J6uxkd2eUns4Ud8pDGG8XTpnRBxD8Kk=\n=tfm7\n-----END PGP SIGNATURE-----\n. \n\nSoftware Description:\n- xen: Public headers and libs for Xen\n\nDetails:\n\nIt was discovered that memory contents previously stored in\nmicroarchitectural special registers after RDRAND, RDSEED, and SGX EGETKEY\nread operations on Intel client and Xeon E3 processors may be briefly\nexposed to processes on the same or different processor cores. (CVE-2020-0543)\n\nJulien Grall discovered that Xen incorrectly handled memory barriers on\nARM-based systems. \n(CVE-2020-11739)\n\nIlja Van Sprundel discovered that Xen incorrectly handled profiling of\nguests. (CVE-2020-11740, CVE-2020-11741)\n\nIt was discovered that Xen incorrectly handled grant tables. \n(CVE-2020-11742, CVE-2020-11743)\n\nJan Beulich discovered that Xen incorrectly handled certain code paths. \n(CVE-2020-15563)\n\nJulien Grall discovered that Xen incorrectly verified memory addresses\nprovided by the guest on ARM-based systems. (CVE-2020-15564)\n\nRoger Pau Monn\\xe9 discovered that Xen incorrectly handled caching on x86 Intel\nsystems. (CVE-2020-15565)\n\nIt was discovered that Xen incorrectly handled error in event-channel port\nallocation. (CVE-2020-15566)\n\nJan Beulich discovered that Xen incorrectly handled certain EPT (Extended\nPage Tables). (CVE-2020-15567)\n\nAndrew Cooper discovered that Xen incorrectly handled PCI passthrough. \n(CVE-2020-25595)\n\nAndrew Cooper discovered that Xen incorrectly sanitized path injections. \n(CVE-2020-25596)\n\nJan Beulich discovered that Xen incorrectly handled validation of event\nchannels. (CVE-2020-25597)\n\nJulien Grall and Jan Beulich discovered that Xen incorrectly handled\nresetting event channels. (CVE-2020-25599)\n\nJulien Grall discovered that Xen incorrectly handled event channels\nmemory allocation on 32-bits domains. (CVE-2020-25600)\n\nJan Beulich discovered that Xen incorrectly handled resetting or cleaning\nup event channels. (CVE-2020-25601)\n\nAndrew Cooper discovered that Xen incorrectly handled certain Intel\nspecific MSR (Model Specific Registers). (CVE-2020-25602)\n\nJulien Grall discovered that Xen incorrectly handled accessing/allocating\nevent channels. \n(CVE-2020-25603)\n\nIgor Druzhinin discovered that Xen incorrectly handled locks. (CVE-2020-25604)\n\nUpdate instructions:\n\nThe problem can be corrected by updating your system to the following\npackage versions:\n\nUbuntu 20.04 LTS:\n libxendevicemodel1 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n libxenevtchn1 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n libxengnttab1 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n libxenmisc4.11 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xen-hypervisor-4.11-amd64 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xen-hypervisor-4.11-arm64 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xen-hypervisor-4.11-armhf 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xen-utils-4.11 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xen-utils-common 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n xenstore-utils 4.11.3+24-g14b62ab3e5-1ubuntu2.3\n\nAfter a standard system update you need to reboot your computer to make\nall the necessary changes. \n\nReferences:\n https://ubuntu.com/security/notices/USN-5617-1\n CVE-2020-0543, CVE-2020-11739, CVE-2020-11740, CVE-2020-11741,\n CVE-2020-11742, CVE-2020-11743, CVE-2020-15563, CVE-2020-15564,\n CVE-2020-15565, CVE-2020-15566, CVE-2020-15567, CVE-2020-25595,\n CVE-2020-25596, CVE-2020-25597, CVE-2020-25599, CVE-2020-25600,\n CVE-2020-25601, CVE-2020-25602, CVE-2020-25603, CVE-2020-25604\n\nPackage Information:\n https://launchpad.net/ubuntu/+source/xen/4.11.3+24-g14b62ab3e5-1ubuntu2.3\n",
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- 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.