Use After Free in Gnu Gnutls
CVE-2021-20231
A flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.
Vulnerability class: Use-After-Free
EPSS: 0.038 (88.7th percentile) — read the EPSS interpretation.
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.
Affected products
- Gnu Gnutls
- Netapp Active_iq_unified_manager
- Netapp E-series_performance_analyzer
- Fedoraproject Fedora — versions 34
- Redhat Enterprise_linux — versions 8.0
- N/a Gnutls — versions gnutls 3.7.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
- secalert@redhat.com (Exploit, x_refsource_MISC, Vendor Advisory)
- secalert@redhat.com (x_refsource_FEDORA, vendor-advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
- secalert@redhat.com (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2021-20231?
- CVE-2021-20231 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-2021-20231?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-20231 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.