CVE-2018-12020

Published: 8 June 2018

mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and verification actions, which allows remote attackers to spoof the output that GnuPG sends on file descriptor 2 to other programs that use the "--status-fd 2" option. For example, the OpenPGP data might represent an original filename that contains line feed characters in conjunction with GOODSIG or VALIDSIG status codes.

From the Ubuntu Security Team

Marcus Brinkmann discovered that GnuPG before 2.2.8 improperly handled certain command line parameters. A remote attacker could use this to spoof the output of GnuPG and cause unsigned e-mail to appear signed.

Priority

CVSS 3 base score: 7.5

Status

Package	Release	Status
enigmail Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Needed
	cosmic	Ignored (reached end-of-life)
	disco	Ignored (reached end-of-life)
	eoan	Ignored (reached end-of-life)
	focal	Needed
	groovy	Ignored (reached end-of-life)
	hirsute	Ignored (reached end-of-life)
	impish	Ignored (reached end-of-life)
	jammy	Needed
	kinetic	Needed
	precise	Does not exist
	trusty	Does not exist (trusty was needed)
	upstream	Released (2.0.7)
	xenial	Ignored (end of standard support, was needed)
gnupg Launchpad, Ubuntu, Debian	artful	Does not exist
	bionic	Does not exist
	cosmic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	groovy	Does not exist
	hirsute	Does not exist
	impish	Does not exist
	jammy	Does not exist
	kinetic	Does not exist
	precise	Released (1.4.11-3ubuntu2.11)
	trusty	Released (1.4.16-1ubuntu2.5)
	upstream	Released (1.4.18-7+deb8u5)
	xenial	Released (1.4.20-1ubuntu3.2)
gnupg1 Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Needed
	cosmic	Ignored (reached end-of-life)
	disco	Ignored (reached end-of-life)
	eoan	Not vulnerable (1.4.22-5)
	focal	Not vulnerable (1.4.22-5)
	groovy	Not vulnerable (1.4.22-5)
	hirsute	Not vulnerable (1.4.22-5)
	impish	Not vulnerable (1.4.22-5)
	jammy	Not vulnerable (1.4.22-5)
	kinetic	Not vulnerable (1.4.22-5)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (1.4.22-5)
	xenial	Does not exist
gnupg2 Launchpad, Ubuntu, Debian	artful	Released (2.1.15-1ubuntu8.1)
	bionic	Released (2.2.4-1ubuntu1.1)
	cosmic	Released (2.2.8-1ubuntu1)
	disco	Released (2.2.8-1ubuntu1)
	eoan	Released (2.2.8-1ubuntu1)
	focal	Released (2.2.8-1ubuntu1)
	groovy	Released (2.2.8-1ubuntu1)
	hirsute	Released (2.2.8-1ubuntu1)
	impish	Released (2.2.8-1ubuntu1)
	jammy	Released (2.2.8-1ubuntu1)
	kinetic	Released (2.2.8-1ubuntu1)
	precise	Does not exist
	trusty	Does not exist (trusty was released [2.0.22-3ubuntu1.4])
	upstream	Released (2.2.8-1)
	xenial	Released (2.1.11-6ubuntu2.1)
python-gnupg Launchpad, Ubuntu, Debian	artful	Ignored (reached end-of-life)
	bionic	Released (0.4.1-1ubuntu1.18.04.1)
	cosmic	Released (0.4.1-1ubuntu1.18.10.1)
	disco	Not vulnerable (0.4.3-1ubuntu1)
	eoan	Not vulnerable (0.4.3-1ubuntu1)
	focal	Not vulnerable (0.4.3-1ubuntu1)
	groovy	Not vulnerable (0.4.3-1ubuntu1)
	hirsute	Not vulnerable (0.4.3-1ubuntu1)
	impish	Not vulnerable (0.4.3-1ubuntu1)
	jammy	Not vulnerable (0.4.3-1ubuntu1)
	kinetic	Not vulnerable (0.4.3-1ubuntu1)
	precise	Does not exist
	trusty	Needed
	upstream	Released (0.4.3-1)
	xenial	Ignored (end of standard support, was needed)

References

Bugs

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=901088

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