Vulnerability · Published Oct 19, 2021 · Assigned by redhat

CVE-2021-3746

Medium 6.5

In plain English

A medium-severity memory corruption in libtpms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)6.5Medium

Exploit odds (30 days)1.0%top 38.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	libtpms	0.9.1-1	DEBIAN-CVE-2021-3746
Debian:13	libtpms	0.9.1-1	DEBIAN-CVE-2021-3746
Debian:14	libtpms	0.9.1-1	DEBIAN-CVE-2021-3746
Ubuntu:22.04:LTS	libtpms	0.9.3-0ubuntu1	UBUNTU-CVE-2021-3746

Affected products (as reported)

Vendor	Product	Versions
n/a	libtpms	libtpms 0.8.5, libtpms 0.7.9, libtpms 0.6.6

Weakness: CWE-119

References

https://bugzilla.redhat.com/show_bug.cgi?id=1998588 x_refsource_MISC