GLSA-200805-20 : GnuTLS: Execution of arbitrary code
Critical Nessus Plugin ID 32418
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200805-20 (GnuTLS: Execution of arbitrary code)
Ossi Herrala and Jukka Taimisto of Codenomicon reported three vulnerabilities in libgnutls of GnuTLS:
'Client Hello' messages containing an invalid server name can lead to a buffer overflow when evaluating 'Security Parameters' (CVE-2008-1948).
Multiple 'Client Hello' messages can lead to a NULL pointer dereference (CVE-2008-1949).
A TLS handshake including an encrypted 'Client Hello' message and an invalid record length could lead to a buffer overread (CVE-2008-1950).
Unauthenticated remote attackers could exploit these vulnerabilities to cause Denial of Service conditions in daemons using GnuTLS. The first vulnerability (CVE-2008-1948) might allow for the execution of arbitrary code with the privileges of the daemon handling incoming TLS connections.
There is no known workaround at this time.
SolutionAll GnuTLS users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-libs/gnutls-2.2.5'