PT-2021-18658 · Gnu+3 · Gnu Chess+3

Michael Vaughan · Published 2021-04-07 · Updated 2025-03-06 · CVE-2021-30184

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions GNU Chess version 6.2.7

Description The issue allows attackers to execute arbitrary code via crafted PGN (Portable Game Notation) data. This is related to a buffer overflow in the use of a .tmp.epd temporary file in the cmd pgnload and cmd pgnreplay functions in frontend/cmd.cc.

Recommendations For GNU Chess version 6.2.7, as a temporary workaround, consider disabling the cmd pgnload and cmd pgnreplay functions until a patch is available. Restrict access to the .tmp.epd temporary file to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

ALT-PU-2021-1814

ALT-PU-2025-1310

CVE-2021-30184

DLA-4014-1

MGASA-2021-0250

OPENSUSE-SU-2024:10799-1

USN-7336-1

Affected Products

Alt Linux

Gnu Chess

Linuxmint

Ubuntu

References · 26

• 🔥 https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00001.html · Exploit
• 🔥 https://lists.gnu.org/archive/html/bug-gnu-chess/2021-04/msg00000.html · Exploit
• https://cve.org/CVERecord?id=CVE-2021-30184 · Security Note
• https://ubuntu.com/security/CVE-2021-30184 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7336-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XXOTMUSBVUZNA3JMPG6BU37DQW2YOJWS · Vendor Advisory
• https://osv.dev/vulnerability/USN-7336-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2021-0250.html · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-30184 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-30184 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-30184 · Vendor Advisory
• https://security.gentoo.org/glsa/202107-28 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:10799-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QC74RWMDLSQGV6Z3ZABNTPABB33S4YNF · Vendor Advisory
• https://osv.dev/vulnerability/DLA-4014-1 · Vendor Advisory