GnuTLS: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 200905-04 / gnutls
||May 24, 2009
||May 24, 2009: 01
All supported architectures
Multiple vulnerabilities in GnuTLS might result in a Denial of Service,
spoofing or the generation of invalid keys.
GnuTLS is an Open Source implementation of the TLS 1.0 and SSL 3.0
The following vulnerabilities were found in GnuTLS:
- Miroslav Kratochvil reported that lib/pk-libgcrypt.c does not
properly handle corrupt DSA signatures, possibly leading to a
double-free vulnerability (CVE-2009-1415).
- Simon Josefsson
reported that GnuTLS generates RSA keys stored in DSA structures when
creating a DSA key (CVE-2009-1416).
- Romain Francoise reported
that the _gnutls_x509_verify_certificate() function in
lib/x509/verify.c does not perform time checks, resulting in the
"gnutls-cli" program accepting X.509 certificates with validity times
in the past or future (CVE-2009-1417).
A remote attacker could entice a user or automated system to process a
specially crafted DSA certificate, possibly resulting in a Denial of
Service condition. NOTE: This issue might have other unspecified impact
including the execution of arbitrary code. Furthermore, a remote
attacker could spoof signatures on certificates and the "gnutls-cli"
application can be tricked into accepting an invalid certificate.
There is no known workaround at this time.
All GnuTLS users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.6.6"