Name: CVE-2020-12823: Buffer Copy without Checking Size of Input
Creator: Rapid7
Published: 2020-05-12T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2020-12823, CWE-120, CVSS 9.8, EPSS 0.04743

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.

CVSS Details

CVSS 3.1 Base Score: 9.8
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Arch Linux	—	Upgrade to the latest version of Arch Linux	Jul 11, 2025	May 12, 2020
Debian	—	Upgrade openconnect	May 19, 2020	May 12, 2020
Gentoo Linux	—	Upgrade net-vpn/openconnect.	Jun 16, 2020	May 12, 2020
Suse	—	Upgrade openconnect-develUpgrade openconnect-docUpgrade openconnectUpgrade openconnect-lang	Jul 19, 2020	May 12, 2020
Ubuntu	—	No solution exists	Jun 26, 2025	May 12, 2020

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CVSS Details

Covered by Rapid7

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