drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Mangelnde Eingabeprüfung in GnuPG
Name: |
Mangelnde Eingabeprüfung in GnuPG |
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ID: |
200603-08 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Fr, 10. März 2006, 22:37 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0049
http://lists.gnupg.org/pipermail/gnupg-announce/2006q1/000216.html |
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Applikationen: |
The GNU Privacy Guard |
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Originalnachricht |
This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig1623921CF5CDB827A9CE3B3B Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200603-08 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: GnuPG: Incorrect signature verification Date: March 10, 2006 Bugs: #125217 ID: 200603-08
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Synopsis ========
GnuPG may erroneously report a modified or unsigned message has a valid digital signature.
Background ==========
The GNU Privacy Guard, GnuPG, is a free replacement for the PGP suite of cryptographic software that may be used without restriction, as it does not rely on any patented algorithms. GnuPG can be used to digitally sign messages, a method of ensuring the authenticity of a message using public key cryptography.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-crypt/gnupg < 1.4.2.2 >= 1.4.2.2
Description ===========
OpenPGP is the standard that defines the format of digital signatures supported by GnuPG. OpenPGP signatures consist of multiple sections, in a strictly defined order. Tavis Ormandy of the Gentoo Linux Security Audit Team discovered that certain illegal signature formats could allow signed data to be modified without detection. GnuPG has previously attempted to be lenient when processing malformed or legacy signature formats, but this has now been found to be insecure.
Impact ======
A remote attacker may be able to construct or modify a digitally-signed message, potentially allowing them to bypass authentication systems, or impersonate another user.
Workaround ==========
There is no known workaround at this time.
Resolution ==========
All GnuPG users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/gnupg-1.4.2.2"
References ==========
[ 1 ] CVE-2006-0049 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-0049 [ 2 ] GnuPG Announcement http://lists.gnupg.org/pipermail/gnupg-announce/2006q1/000216.html
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200603-08.xml
Concerns? =========
Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.
License =======
Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s).
The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
--------------enig1623921CF5CDB827A9CE3B3B Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc"
-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFEEfCovcL1obalX08RAsedAJwP8hBZ4wfWjhFZGNjHqLVMRpORRQCeIQOc pWoHSkWEg/j6hiIA8LLEBbE= =SwCF -----END PGP SIGNATURE-----
--------------enig1623921CF5CDB827A9CE3B3B-- -- gentoo-announce@gentoo.org mailing list
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