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Gentoo Linux Security Advisory GLSA 200805-20 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: GnuTLS: Execution of arbitrary code |
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Date: May 21, 2008 |
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Bugs: #222823 |
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ID: 200805-20 |
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Synopsis |
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======== |
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|
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Multiple vulnerabilities might allow for the execution of arbitrary |
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code in daemons using GnuTLS. |
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Background |
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========== |
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|
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GnuTLS is an implementation of Secure Sockets Layer (SSL) 3.0 and |
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Transport Layer Security (TLS) 1.0, 1.1 and 1.2. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-libs/gnutls < 2.2.5 >= 2.2.5 |
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Description |
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=========== |
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|
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Ossi Herrala and Jukka Taimisto of Codenomicon reported three |
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vulnerabilities in libgnutls of GnuTLS: |
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|
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* "Client Hello" messages containing an invalid server name can lead |
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to a buffer overflow when evaluating "Security Parameters" |
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(CVE-2008-1948). |
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|
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* Multiple "Client Hello" messages can lead to a NULL pointer |
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dereference (CVE-2008-1949). |
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|
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* A TLS handshake including an encrypted "Client Hello" message and |
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an invalid record length could lead to a buffer overread |
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(CVE-2008-1950). |
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|
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Impact |
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====== |
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|
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Unauthenticated remote attackers could exploit these vulnerabilities to |
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cause Denial of Service conditions in daemons using GnuTLS. The first |
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vulnerability (CVE-2008-1948) might allow for the execution of |
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arbitrary code with the privileges of the daemon handling incoming TLS |
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connections. |
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All GnuTLS users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-libs/gnutls-2.2.5" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2008-1948 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1948 |
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[ 2 ] CVE-2008-1949 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1949 |
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[ 3 ] CVE-2008-1950 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1950 |
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|
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200805-20.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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