Home/CVE/The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS
CVE

CVE-2016-9379

The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS

The pygrub boot loader emulator in Xen, when S-expression output format is requested, allows local pygrub-using guest OS administrators to read or delete arbitrary files on the host via string quotes and S-expressions in the bootloader configuration file.

HIGH · CVSS 7.9 EPSS 0.00101
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
▤

Affected Products & Versions

2
xenall versions
citrix xenserverall versions
▣

Scoring & Timeline

7.9
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD23 Jan 2017 · 09:59 PM
CVSS VectorCVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
⚑

Vendor Advisories

7
suse-csafopenSUSE-SU-2024:11520-1
suse-csafSUSE-SU-2016:3273-1
suse-csafSUSE-SU-2016:3174-1
suse-csafSUSE-SU-2016:3156-1
suse-csafSUSE-SU-2016:3083-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/94473Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1037347Third Party AdvisoryVDB Entry
http://xenbits.xen.org/xsa/advisory-198.htmlPatchVendor Advisory
http://xenbits.xen.org/xsa/xsa198.patchPatchVendor Advisory
https://security.gentoo.org/glsa/201612-56
https://support.citrix.com/article/CTX218775PatchThird Party Advisory
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