Buffer overflow in Infradead Openconnect
CVE-2020-12823
OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other impact, via crafted certificate data to get_cert_name in gnutls.c.
Vulnerability class: Buffer Overflow
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: 0.046 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000
Affected products
- Infradead Openconnect — versions 8.09
- Debian Linux — versions 8.0
- Fedoraproject Fedora — versions 30, 31, 32
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gitlab.com/openconnect/openconnect/-/merge_requests/108 (Patch, Third Party Advisory)
- bugs.gentoo.org/721570 (Exploit, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/05/msg00015.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202006-15 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.html (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-12823?
- CVE-2020-12823 is a critical-severity vulnerability in Infradead Openconnect, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 9.8/10. Published 2020-05-12.
- How severe is CVE-2020-12823?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2020-12823 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.