Use After Free in GNU Gnutls
CVE-2021-20232
A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.034 (88.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.034 · newest: 0.034 · change: 0.000
Affected products
- GNU Gnutls
- Fedoraproject Fedora — versions 34
- Red Hat Enterprise Linux — versions 8.0
- Gnutls — versions gnutls 3.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.gnutls.org/security-new.html (Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.apache.org/thread.html/r5f88bed447742fcc5c47bf1c7be965ef450131914a6e1f85f… (mailing-list)
- security.netapp.com/advisory/ntap-20210416-0005/ (Third Party Advisory)
- lists.apache.org/thread.html/rcd70a4c88a47a75fd2d5f3ffb7cee8c2a18c713320bd90fdc… (mailing-list)
- lists.apache.org/thread.html/r5d4001031e7790d8c6396c499522b4ed2aab782da87b1a141… (mailing-list)
- lists.apache.org/thread.html/r9cbc69e57276413788e90a6ee16c7c034ea4258d31935b70d… (mailing-list)
- lists.apache.org/thread.html/rfd5273d72d244178441e6904a2f2b41a3268f569e8092ea0b… (mailing-list)
- lists.apache.org/thread.html/rf5e1256d870193def4a82ad89ab95e63943a313b5ff0d81aa… (mailing-list)
Frequently asked questions
- What is CVE-2021-20232?
- CVE-2021-20232 is a critical-severity vulnerability in GNU Gnutls, classified under Use After Free. CVSS score: 9.8/10. Published 2021-03-12.
- How severe is CVE-2021-20232?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-20232 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.