paul Posted October 5, 2006 Report Share Posted October 5, 2006 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 two denial of service vulnerabilities were discovered. During the parsing of certain invalid ASN1 structures an error condition is mishandled. This can result in an infinite loop which consumes system memory. (CVE-2006-2937) Certain types of public key can take disproportionate amounts of time to process. This could be used by an attacker in a denial of service attack. (CVE-2006-2940) Tavis Ormandy and Will Drewry of the Google Security Team discovered a buffer overflow in the 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. (CVE-2006-3738) 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. (CVE-2006-4343) Updated packages are patched to address these issues. Link to comment Share on other sites More sharing options...
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