The GPGSM utility included in GnuPG contains a use-after-free vulnerability that may allow an unauthenticated remote attacker to execute arbitrary code.
|Package||app-crypt/gnupg on all architectures|
|Affected versions||< 2.0.16-r1|
|Unaffected versions||>= 2.0.16-r1
The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite of cryptographic software. The GPGSM utility in GnuPG is responsible for processing X.509 certificates, signatures and encryption as well as S/MIME messages.
The GPGSM utility in GnuPG contains a use-after-free vulnerability that may be exploited when importing a crafted X.509 certificate explicitly or during the signature verification process.
An unauthenticated remote attacker may execute arbitrary code with the privileges of the user running GnuPG by enticing them to import a crafted certificate.
There is no known workaround at this time.
All GnuPG 2.x users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/gnupg-2.0.16-r1"
October 22, 2011
October 22, 2011: 1