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[ GLSA 200901-10 ] GnuTLS: Certificate validation error
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GLSA
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PostPosted: Wed Jan 14, 2009 11:26 pm    Post subject: [ GLSA 200901-10 ] GnuTLS: Certificate validation error Reply with quote

Gentoo Linux Security Advisory

Title: GnuTLS: Certificate validation error (GLSA 200901-10)
Severity: normal
Exploitable: remote
Date: January 14, 2009
Bug(s): #245850
ID: 200901-10

Synopsis


A certificate validation error in GnuTLS might allow for spoofing attacks.


Background


GnuTLS is an open-source implementation of TLS 1.0 and SSL 3.0.


Affected Packages

Package: net-libs/gnutls
Vulnerable: < 2.4.1-r2
Unaffected: >= 2.4.1-r2
Architectures: All supported architectures


Description


Martin von Gagern reported that the _gnutls_x509_verify_certificate()
function in lib/x509/verify.c trusts certificate chains in which the
last certificate is an arbitrary trusted, self-signed certificate.


Impact


A remote attacker could exploit this vulnerability and spoof arbitrary
names to conduct Man-In-The-Middle attacks and intercept sensitive
information.


Workaround


There is no known workaround at this time.


Resolution


All GnuTLS users should upgrade to the latest version:
Code:
# emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.4.1-r2"


References

CVE-2008-4989


Last edited by GLSA on Wed Feb 13, 2013 4:28 am; edited 2 times in total
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