Headline
Ubuntu Security Notice USN-5503-2
Ubuntu Security Notice 5503-2 - USN-5503-1 fixed a vulnerability in GnuPG. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Demi Marie Obenour discovered that GnuPG incorrectly handled injection in the status message. A remote attacker could possibly use this issue to forge signatures.
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Ubuntu Security Notice USN-5503-2
July 12, 2022
gnupg, gnupg2 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM
Summary:
GnuPG could allow forged signatures.
Software Description:
- gnupg: GNU privacy guard - a free PGP replacement
- gnupg2: GNU privacy guard - a free PGP replacement
Details:
USN-5503-1 fixed a vulnerability in GnuPG. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
Demi Marie Obenour discovered that GnuPG incorrectly handled injection in
the status message. A remote attacker could possibly use this issue to
forge signatures.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 ESM:
gnupg 1.4.20-1ubuntu3.3+esm2
gnupg2 2.1.11-6ubuntu2.1+esm1
Ubuntu 14.04 ESM:
gnupg 1.4.16-1ubuntu2.6+esm1
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-5503-2
https://ubuntu.com/security/notices/USN-5503-1
CVE-2022-34903
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Ubuntu Security Notice 5503-1 - Demi Marie Obenour discovered that GnuPG incorrectly handled injection in the status message. A remote attacker could possibly use this issue to forge signatures.
GnuPG through 2.3.6, in unusual situations where an attacker possesses any secret-key information from a victim's keyring and other constraints (e.g., use of GPGME) are met, allows signature forgery via injection into the status line.