Secunia

Multiple vulnerabilities have been identified in OpenSSL, which potentially allow malicious people to cause a DoS (Denial of Service) or to compromise a vulnerable system.

1) ASN.1 encodings rejected by the parser because they are invalid may cause a deallocation of memory. It is currently unknown if this can be exploited to execute arbitrary code or merely cause a DoS.

2) It is possible to cause an out of bounds read by supplying unusual ASN.1 tag values. This may cause a DoS.

3) If OpenSSL is in debug mode, an invalid public key in a certificate may cause the verify code to crash. This could lead to a DoS against systems running in debug mode.

An error causes OpenSSL to parse and handle client certificates even when OpenSSL isn't configured to do so.

Version 0.9.6j and prior are vulnerable (0.9.6 versions are not affected by issue 1).
Version 0.9.7b and prior are vulnerable.

Solution
Update to version 0.9.6k or 0.9.7c.
Further details available in Customer Area

Provided and/or discovered by
NISCC

Changelog
Further details available in Customer Area

Original Advisory
http://www.uniras.gov.uk/vuls/2003/006489/openssl.htm
http://www.openssl.org/news/secadv_20030930.txt

Other references
Further details available in Customer Area

Deep Links
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