Vulnerability · Published Mar 2, 2022 · Assigned by redhat
CVE-2021-3623
Medium 6.1
In plain English
A medium-severity out-of-bounds write in libtpms. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)6.1Medium
Exploit odds (30 days)0.3%top 74.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A flaw was found in libtpms. The flaw can be triggered by specially-crafted TPM 2 command packets containing illegal values and may lead to an out-of-bounds access when the volatile state of the TPM 2 is marshalled/written or unmarshalled/read. The highest threat from this vulnerability is to system availability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libtpms | 0.9.1-1 | DEBIAN-CVE-2021-3623 |
| Debian:13 | libtpms | 0.9.1-1 | DEBIAN-CVE-2021-3623 |
| Debian:14 | libtpms | 0.9.1-1 | DEBIAN-CVE-2021-3623 |
| Ubuntu:22.04:LTS | libtpms | 0.9.3-0ubuntu1 | UBUNTU-CVE-2021-3623 |
Affected products (as reported)
Weakness: CWE-787
References
- FEDORA-2021-465b5c3b67 vendor-advisory, x_refsource_FEDORA
- https://bugzilla.redhat.com/show_bug.cgi?id=1976806 x_refsource_MISC
- https://github.com/stefanberger/libtpms/pull/223 x_refsource_MISC
- https://github.com/stefanberger/libtpms/commit/2f30d62 x_refsource_MISC
- https://github.com/stefanberger/libtpms/commit/7981d9a x_refsource_MISC
- https://github.com/stefanberger/libtpms/commit/2e6173c x_refsource_MISC