GNU Chess 6.2.7 PGN frontend/cmd.cc cmd_pgnload/cmd_pgnreplay buffer overflow

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CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.58

A vulnerability was found in GNU Chess 6.2.7. It has been declared as critical. This vulnerability affects the function cmd_pgnload/cmd_pgnreplay of the file frontend/cmd.cc of the component PGN Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-120. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

GNU Chess 6.2.7 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.

The weakness was disclosed 04/07/2021. The advisory is available at lists.gnu.org. This vulnerability was named CVE-2021-30184 since 04/07/2021. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 04/11/2021).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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CVSSv3infoedit

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2infoedit

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-120
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

04/07/2021 Advisory disclosed
04/07/2021 +0 days CVE assigned
04/07/2021 +0 days VulDB entry created
04/11/2021 +4 days VulDB last update

Sourcesinfoedit

Vendor: https://www.gnu.org/

Advisory: lists.gnu.org
Status: Not defined

CVE: CVE-2021-30184 (🔒)

Entryinfoedit

Created: 04/07/2021 06:00 PM
Updated: 04/11/2021 03:05 PM
Changes: (2) source_cve_assigned source_cve_nvd_summary
Complete: 🔍

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