CVE-2016-9379
high
CVSS v3
7.9
CVSS v4 NEW
—
VIR risk
7.9
Description
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.
Predictions
Exploit likelihood
76%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.8.0-1 |
| debian | bullseye | fixed | 4.8.0-1 |
| debian | forky | fixed | 4.8.0-1 |
| debian | sid | fixed | 4.8.0-1 |
| debian | trixie | fixed | 4.8.0-1 |
References
- http://www.securityfocus.com/bid/94473
- http://www.securitytracker.com/id/1037347
- http://xenbits.xen.org/xsa/advisory-198.html
- http://xenbits.xen.org/xsa/xsa198.patch
- https://security.gentoo.org/glsa/201612-56
- https://support.citrix.com/article/CTX218775
- https://www.suse.com/security/cve/CVE-2016-9379.html
- https://security-tracker.debian.org/tracker/CVE-2016-9379
CWEs
CWE-20
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.