GnuTLS: Execution of arbitrary code

GnuTLS: Execution of arbitrary code Multiple vulnerabilities might allow for the execution of arbitrary code in daemons using GnuTLS. gnutls 2008-05-21 2008-05-21 222823 remote 2.2.5 2.2.5

GnuTLS is an implementation of Secure Sockets Layer (SSL) 3.0 and Transport Layer Security (TLS) 1.0, 1.1 and 1.2.

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.

All GnuTLS users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.2.5"

CVE-2008-1948 CVE-2008-1949 CVE-2008-1950 rbu rbu