CVE-2020-29485 — Missing Release of Memory after Effective Lifetime in XEN

CWE-401 — Missing Release of Memory after Effective Lifetime4 documents4 sources
Severity
5.5MEDIUMNVD
EPSS
0.1%
top 80.63%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
XENDebian XENDebian Linux+1 more
Timeline
PublishedDec 15
Latest updateMay 24

Description

An issue was discovered in Xen 4.6 through 4.14.x. When acting upon a guest XS_RESET_WATCHES request, not all tracking information is freed. A guest can cause unbounded memory usage in oxenstored. This can lead to a system-wide DoS. Only systems using the Ocaml Xenstored implementation are vulnerable. Systems using the C Xenstored implementation are not vulnerable.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages3 packages

▶debiandebian/xen< xen 4.14.0+88-g1d1d1f5391-1 (bookworm)
▶Debianxen/xen< 4.14.0+88-g1d1d1f5391-1+3
▶NVDxen/xen4.6.0 — 4.14.0

Also affects: Debian Linux 10.0, Fedora 32, 33

Patches

Patch: xenbits.xenproject.org ↗Patch: xenbits.xenproject.org ↗

🔴Vulnerability Details

2
GHSA
GHSA-5x7q-6f7m-fc5c: An issue was discovered in Xen 4↗2022-05-24
▶
OSV
CVE-2020-29485: An issue was discovered in Xen 4↗2020-12-15
▶

📋Vendor Advisories

1
Debian
CVE-2020-29485: xen - An issue was discovered in Xen 4.6 through 4.14.x. When acting upon a guest XS_R...↗2020
▶