Vulnerability Details : 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 category: OverflowDenial of service
Exploit prediction scoring system (EPSS) score for CVE-2020-12823
Probability of exploitation activity in the next 30 days: 1.41%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 86 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-12823
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2020-12823
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The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-12823
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00056.html
[security-announce] openSUSE-SU-2020:1027-1: moderate: Security update fMailing List;Third Party Advisory
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http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00039.html
[security-announce] openSUSE-SU-2020:0997-1: moderate: Security update fMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AYSXLXAPXD2T73T6JMHI5G2WP7KHAGMN/
[SECURITY] Fedora 32 Update: openconnect-8.10-1.fc32 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/25MFX4AZE7RDCUWOL4ZOE73YBOPUMQDX/
[SECURITY] Fedora 30 Update: openconnect-8.10-1.fc30 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BEVTIH5UFX35CC7MVSYBGRM3D66ACFD5/
[SECURITY] Fedora 31 Update: openconnect-8.10-1.fc31 - package-announce - Fedora Mailing-ListsMailing List;Third Party Advisory
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https://bugs.gentoo.org/721570
721570 – net-vpn/ocserv-1.0.1: test failures on arm64 due to stack smashing detection with LD_PRELOAD=libsocket_wrapper.soExploit;Third Party Advisory
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https://security.gentoo.org/glsa/202006-15
OpenConnect: Multiple vulnerabilities (GLSA 202006-15) — Gentoo securityThird Party Advisory
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https://lists.debian.org/debian-lts-announce/2020/05/msg00015.html
[SECURITY] [DLA 2212-1] openconnect security updateMailing List;Third Party Advisory
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https://gitlab.com/openconnect/openconnect/-/merge_requests/108
gnutls: prevent buffer overflow in get_cert_name (!108) · Merge Requests · OpenConnect VPN projects / OpenConnect · GitLabPatch;Third Party Advisory
Products affected by CVE-2020-12823
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*
- cpe:2.3:a:infradead:openconnect:8.09:*:*:*:*:*:*:*