OpenSSL "ssl3_get_key_exchange()" Use-after-free Vulnerability

2010-08-19 / 2010-08-20
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-Other


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: None
Availability impact: Partial

openssl-1.0.0a on ubuntu, debian and arch. ~/local/bin/openssl s_server -www -accept 8888 -cert /tmp/CA.cert -key /tmp/CA.key ~/local/bin/openssl s_client -connect localhost:8888 depth=0 CN = CA verify return:1 *** glibc detected *** /home/build/local/bin/openssl: double free or corruption (fasttop): 0x0000000000979300 *** ~/local/bin/openssl rsa -check -in /tmp/CA.key |more writing RSA key RSA key error: q not prime # definitely --

References:

http://www.vupen.com/english/advisories/2010/2038
http://www.openwall.com/lists/oss-security/2010/08/11/6
http://www.mail-archive.com/openssl-dev@openssl.org/msg28049.html
http://www.mail-archive.com/openssl-dev@openssl.org/msg28045.html
http://www.mail-archive.com/openssl-dev@openssl.org/msg28043.html
http://securitytracker.com/id?1024296
http://secunia.com/advisories/40906
http://seclists.org/fulldisclosure/2010/Aug/84


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