GnuTLS: Execution of arbitrary code
1.
Gentoo Linux Security Advisory
Version Information
| Advisory Reference |
GLSA 200805-20 / gnutls |
| Release Date |
May 21, 2008 |
| Latest Revision |
May 21, 2008: 01 |
| Impact |
high |
| Exploitable |
remote |
| Package |
Vulnerable versions |
Unaffected versions |
Architecture(s) |
| net-libs/gnutls |
<
2.2.5 |
>=
2.2.5 |
All supported architectures
|
Related bugreports:
#222823
Synopsis
Multiple vulnerabilities might allow for the execution of arbitrary code in
daemons using GnuTLS.
2.
Impact Information
Background
GnuTLS is an implementation of Secure Sockets Layer (SSL) 3.0 and
Transport Layer Security (TLS) 1.0, 1.1 and 1.2.
Description
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).
Impact
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.
3.
Resolution Information
Workaround
There is no known workaround at this time.
Resolution
All GnuTLS users should upgrade to the latest version:
Code Listing 3.1: Resolution |
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.2.5"
|
4.
References
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