GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG 2.2.23 is a fixed version.

According to the versions of the gnupg2 package installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly     unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD     preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG     2.2.23 is a fixed version. (CVE-2020-25125)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

According to the versions of the gnupg2 package installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - GnuPG 2.2.21 and 2.2.22 (and Gpg4win 3.1.12) has an array overflow, leading to a crash or possibly     unspecified other impact, when a victim imports an attacker's OpenPGP key, and this key has AEAD     preferences. The overflow is caused by a g10/key-check.c error. NOTE: GnuPG 2.3.x is unaffected. GnuPG     2.2.23 is a fixed version. (CVE-2020-25125)

Note that Tenable Network Security has extracted the preceding description block directly from the EulerOS security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Importing an OpenPGP key having a preference list for AEAD algorithms will lead to an array overflow and thus often to a crash or other undefined behaviour.

Importing an arbitrary key can often easily be triggered by an attacker and thus triggering this bug. Exploiting the bug aside from crashes is not trivial but likely possible for a dedicated attacker.
The major hurdle for an attacker is that only every second byte is under their control with every first byte having a fixed value of 0x04.

ID	Name	Product	Family	Severity
163206	EulerOS Virtualization 2.10.0 : gnupg2 (EulerOS-SA-2022-2024)	Nessus	Huawei Local Security Checks	high
163194	EulerOS Virtualization 2.10.1 : gnupg2 (EulerOS-SA-2022-2052)	Nessus	Huawei Local Security Checks	high
160046	EulerOS 2.0 SP10 : gnupg2 (EulerOS-SA-2022-1486)	Nessus	Huawei Local Security Checks	high
159918	EulerOS 2.0 SP10 : gnupg2 (EulerOS-SA-2022-1505)	Nessus	Huawei Local Security Checks	high
140238	FreeBSD : gnupg -- AEAD key import overflow (f9fa7adc-ee51-11ea-a240-002590acae31)	Nessus	FreeBSD Local Security Checks	high

Detections

Analytics

CVE-2020-25125

high

Tenable Plugins

high

high

high

high

high