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Home >> Browse Vulnerability Assessment Database >> Debian Local Security Checks >> [DSA1195] DSA-1195-1 openssl096


Vulnerability Assessment Details

[DSA1195] DSA-1195-1 openssl096

Vulnerability Assessment Summary
DSA-1195-1 openssl096

Detailed Explanation for this Vulnerability Assessment

Multiple vulnerabilities have been discovered in the OpenSSL
cryptographic software package that could permit a possible hacker to launch
a denial of service attack by exhausting system resources or crashing
processes on a victim's computer.
Tavis Ormandy and Will Drewry of the Google Security Team
discovered a buffer overflow in SSL_get_shared_ciphers utility
function, used by some applications such as exim and mysql. An
attacker could send a list of ciphers that would overrun a
buffer.
Tavis Ormandy and Will Drewry of the Google Security Team
discovered a possible DoS in the sslv2 client code. Where a
client application uses OpenSSL to make a SSLv2 connection to
a malicious server that server could cause the client to
crash.
Dr S N Henson of the OpenSSL core team and Open Network
Security recently developed an ASN1 test suite for NISCC
(www.niscc.gov.uk). When the test suite was run against
OpenSSL a DoS was discovered.
Certain types of public key can take disproportionate amounts
of time to process. This could be used by a possible hacker in a
denial of service attack.
For the stable distribution (sarge) these problems have been fixed in
version 0.9.6m-1sarge4.
This package exists only for compatibility with older software, and is
not present in the unstable or testing branches of Debian.
We recommend that you upgrade your openssl096 package. Note that
services linking against the openssl shared libraries will need to be
restarted. Common examples of such services include most Mail
Transport Agents, SSH servers, and web servers.


Solution : http://www.debian.org/security/2006/dsa-1195
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is (C) 2006 Michel Arboi

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