Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
[ GLSA 200602-10 ] GnuPG: Incorrect signature verification
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index News & Announcements
View previous topic :: View next topic  
Author Message
GLSA
Advocate
Advocate


Joined: 12 May 2004
Posts: 2663

PostPosted: Sat Feb 18, 2006 1:26 pm    Post subject: [ GLSA 200602-10 ] GnuPG: Incorrect signature verification Reply with quote

Gentoo Linux Security Advisory

Title: GnuPG: Incorrect signature verification (GLSA 200602-10)
Severity: normal
Exploitable: remote
Date: February 18, 2006
Bug(s): #122721
ID: 200602-10

Synopsis

Applications relying on GnuPG to authenticate digital signatures may incorrectly believe a signature has been verified.

Background

GnuPG (The GNU Privacy Guard) is a free replacement for PGP (Pretty Good Privacy). As GnuPG does not rely on any patented algorithms, it can be used without any restrictions. gpgv is the OpenPGP signature verification tool provided by the GnuPG system.

Affected Packages

Package: app-crypt/gnupg
Vulnerable: < 1.4.2.1
Unaffected: >= 1.4.2.1
Architectures: All supported architectures


Description

Tavis Ormandy of the Gentoo Linux Security Auditing Team discovered that automated systems relying on the return code of GnuPG or gpgv to authenticate digital signatures may be misled by malformed signatures. GnuPG documentation states that a return code of zero (0) indicates success, however gpg and gpgv may also return zero if no signature data was found in a detached signature file.

Impact

An attacker may be able to bypass authentication in automated systems relying on the return code of gpg or gpgv to authenticate digital signatures.

Workaround

There is no known workaround at this time.

Resolution

All GnuPG users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-crypt/gnupg-1.4.2.1"


References

GnuPG Security Announcement
CVE-2006-0455


Last edited by GLSA on Thu Jun 29, 2006 4:19 am; edited 3 times in total
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index News & Announcements All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum