Home/CVE/OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other im
CVE

CVE-2020-12823

OpenConnect 8.09 has a buffer overflow, causing a denial of service (application crash) or possibly unspecified other im

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.

CRITICAL · CVSS 9.8 EPSS 0.01863
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
▤

Affected Products & Versions

4
infradead openconnectall versions
fedoraproject fedoraall versions
debian linuxall versions
opensuse leapall versions
⚠

Public Exploits & PoCs

1
pocbugs.gentoo.org · 721570bugs.gentoo.org
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 May 2020 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

6
suse-csafopenSUSE-SU-2024:11114-1
suse-csafSUSE-SU-2024:0317-1
suse-csafopenSUSE-SU-2020:1027-1
suse-csafopenSUSE-SU-2020:0997-1
suse-csafSUSE-SU-2020:1930-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.htmlMailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.htmlMailing ListThird Party Advisory
https://gitlab.com/openconnect/openconnect/-/merge_requests/108PatchThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/05/msg00015.htmlMailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/25MFX4AZE7RDCUWOL4ZOE73YBOPUMQDX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AYSXLXAPXD2T73T6JMHI5G2WP7KHAGMN/
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