CVE-2020-11742
Summary
| CVE | CVE-2020-11742 |
|---|---|
| State | PUBLIC |
| Assigner | [email protected] |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2020-04-14 13:15:00 UTC |
| Updated | 2023-11-07 03:15:00 UTC |
| Description | 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. |
Risk And Classification
Problem Types: NVD-CWE-Other
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| 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
| Reference | Source | Link | Tags |
|---|---|---|---|
| [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-318 - Xen Security Advisories | MISC | xenbits.xen.org | Patch, Vendor Advisory |
| Xen: Multiple vulnerabilities (GLSA 202005-08) — Gentoo security | GENTOO | security.gentoo.org | |
| XSA-318 - Xen Security Advisories | CONFIRM | xenbits.xen.org | Patch, Vendor Advisory |
| oss-security - Xen Security Advisory 318 v3 (CVE-2020-11742) - Bad continuation handling in GNTTABOP_copy | MLIST | www.openwall.com | Mitigation, Patch, Third Party Advisory |
| [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 | |
| [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 | |
| [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 |
No vendor comments have been submitted for this CVE.