1. Gentoo Linux Security Advisory
| Advisory Reference | GLSA 200612-03 / gnupg |
| Release Date | December 10, 2006 |
| Latest Revision | December 10, 2006: 02 |
| Impact | normal |
| Exploitable | remote |
| Package | Vulnerable versions | Unaffected versions | Architecture(s) |
| app-crypt/gnupg | < 1.4.6 | >= 1.4.6 | All supported architectures |
Related bugreports: #156476, #156947
GnuPG is vulnerable to a buffer overflow and an erroneous function pointer dereference that can result in the execution of arbitrary code.
The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite of cryptographic software.
Hugh Warrington has reported a boundary error in GnuPG, in the "ask_outfile_name()" function from openfile.c: the make_printable_string() function could return a string longer than expected. Additionally, Tavis Ormandy of the Gentoo Security Team reported a design error in which a function pointer can be incorrectly dereferenced.
A remote attacker could entice a user to interactively use GnuPG on a crafted file and trigger the boundary error, which will result in a buffer overflow. They could also entice a user to process a signed or encrypted file with gpg or gpgv, possibly called through another application like a mail client, to trigger the dereference error. Both of these vulnerabilities would result in the execution of arbitrary code with the permissions of the user running GnuPG. gpg-agent, gpgsm and other tools are not affected.
There is no known workaround at this time.
All GnuPG users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync # emerge --ask --oneshot --verbose "=app-crypt/gnupg-1.4*" |