Buffer overflow in Libtpms Project
CVE-2021-3623
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Libtpms Project
- Fedoraproject Fedora — versions 34
- Red Hat Enterprise Linux — versions 8.0
- Libtpms — versions Fixed-In - libtpms 0.6.5, libtpms 0.7.8, libtpms 0.8.4
Weakness classification (CWE)
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- github.com/stefanberger/libtpms/pull/223 (Third Party Advisory, Issue Tracking)
- github.com/stefanberger/libtpms/commit/2f30d62 (Patch, Third Party Advisory)
- github.com/stefanberger/libtpms/commit/7981d9a (Patch, Third Party Advisory)
- github.com/stefanberger/libtpms/commit/2e6173c (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-3623?
- CVE-2021-3623 is a medium-severity vulnerability in Libtpms Project, classified under Out-of-bounds Write. CVSS score: 6.1/10. Published 2022-03-02.
- How severe is CVE-2021-3623?
- Medium severity. CVSS v3 base score is 6.1 out of 10.