GLSA Advocate
Joined: 12 May 2004 Posts: 2663
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Posted: Thu Sep 07, 2006 9:26 pm Post subject: [ GLSA 200609-05 ] OpenSSL, AMD64 x86 emulation base librari |
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Gentoo Linux Security Advisory
Title: OpenSSL, AMD64 x86 emulation base libraries: RSA signature forgery (GLSA 200609-05)
Severity: normal
Exploitable: remote
Date: September 07, 2006
Updated: September 08, 2006
Bug(s): #146375, #146438
ID: 200609-05
Synopsis
OpenSSL fails to properly validate PKCS #1 v1.5 signatures.
Background
OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport Layer Security protocols and a general-purpose cryptography library. The x86 emulation base libraries for AMD64 contain a vulnerable version of OpenSSL.
Affected Packages
Package: dev-libs/openssl
Vulnerable: < 0.9.7k
Unaffected: >= 0.9.7k
Architectures: All supported architectures
Package: app-emulation/emul-linux-x86-baselibs
Vulnerable: < 2.5.2
Unaffected: >= 2.5.2
Architectures: amd64
Description
Daniel Bleichenbacher discovered that it might be possible to forge signatures signed by RSA keys with the exponent of 3.
Impact
Since several CAs are using an exponent of 3 it might be possible for an attacker to create a key with a false CA signature.
Workaround
There is no known workaround at this time.
Resolution
All OpenSSL users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.7k" | All AMD64 x86 emulation base libraries users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=app-emulation/emul-linux-x86-baselibs-2.5.2" |
References
CVE-2006-4339
Last edited by GLSA on Sat Sep 09, 2006 4:17 am; edited 1 time in total |
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