Ubuntu 14.04 LTS / 16.04 LTS / 17.10 / 18.04 LTS : gnupg, gnupg2 vulnerabilities (USN-3675-1)
Medium Nessus Plugin ID 110475
SynopsisThe remote Ubuntu host is missing one or more security-related patches.
DescriptionMarcus Brinkmann discovered that during decryption or verification, GnuPG did not properly filter out terminal sequences when reporting the original filename. An attacker could use this to specially craft a file that would cause an application parsing GnuPG output to incorrectly interpret the status of the cryptographic operation reported by GnuPG. (CVE-2018-12020)
Lance Vick discovered that GnuPG did not enforce configurations where key certification required an offline master Certify key. An attacker with access to a signing subkey could generate certifications that appeared to be valid. This issue only affected Ubuntu 18.04 LTS.
Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
SolutionUpdate the affected gnupg and / or gpg packages.