CVE-2020-11743

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Summary

CVECVE-2020-11743
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-04-14 13:15:00 UTC
Updated2023-11-07 03:15:00 UTC
DescriptionAn issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.

Risk And Classification

Problem Types: CWE-755

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 32 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Xen Xen 4.13.0 rc1 All All
Operating System Xen Xen 4.13.0 rc2 All All
Operating System Xen Xen 4.13.0 rc1 All All
Operating System Xen Xen 4.13.0 rc2 All All
Operating System Xen Xen All All All All

References

ReferenceSourceLinkTags
[SECURITY] Fedora 30 Update: xen-4.11.4-1.fc30 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 32 Update: xen-4.13.0-7.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
XSA-316 - Xen Security Advisories CONFIRM xenbits.xen.org Exploit, Vendor Advisory
Xen: Multiple vulnerabilities (GLSA 202005-08) — Gentoo security GENTOO security.gentoo.org
[SECURITY] Fedora 32 Update: xen-4.13.0-7.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org Third Party Advisory
[SECURITY] Fedora 30 Update: xen-4.11.4-1.fc30 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
XSA-316 - Xen Security Advisories MISC xenbits.xen.org Exploit, Vendor Advisory
[SECURITY] Fedora 31 Update: xen-4.12.2-3.fc31 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
Debian -- Security Information -- DSA-4723-1 xen DEBIAN www.debian.org
oss-security - Xen Security Advisory 316 v3 (CVE-2020-11743) - Bad error path in GNTTABOP_map_grant MLIST www.openwall.com Patch, Third Party Advisory
[SECURITY] Fedora 31 Update: xen-4.12.2-3.fc31 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[security-announce] openSUSE-SU-2020:0599-1: important: Security update SUSE lists.opensuse.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 198943 Ubuntu Security Notification for Xen Vulnerabilities (USN-5617-1)
  • 378872 Citrix XenServer Security Updates (CTX270837)
  • 500755 Alpine Linux Security Update for xen
  • 500788 Alpine Linux Security Update for xen
  • 501174 Alpine Linux Security Update for xen
  • 504532 Alpine Linux Security Update for xen
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