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OpenSSL Multiple Vulnerabilities
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Secunia Advisory:
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SA22130
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Release Date:
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2006-09-28
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Last Update:
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2007-10-12
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Popularity:
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22,728 views
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Critical:
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Highly critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | OpenSSL 0.9.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2006-2937
CVE-2006-2940
CVE-2006-3738
CVE-2006-4343
CVE-2007-5135
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Description:
Some vulnerabilities have been reported in OpenSSL, which can be exploited by malicious people to cause a DoS (Denial of Service) and compromise a vulnerable system.
1) An error in the processing of certain invalid ASN.1 structures can be exploited to cause an infinite loop and consume system memory in an application using OpenSSL to process ASN.1 data from untrusted sources.
NOTE: This does not affect versions prior to 0.9.7.
2) Certain types of public keys take overly long time to process and can be exploited to cause a DoS in an application using OpenSSL to process ASN.1 data from untrusted sources.
3) An error in the "SSL_get_shared_ciphers()" function can be exploited to cause a buffer overflow by sending a list of ciphers to an application using the vulnerable function.
Successful exploitation allows execution of arbitrary code.
4) An error in the SSLv2 client code can be exploited by a malicious server to crash a vulnerable client using OpenSSL to create an SSLv2 connection to the server.
Solution:
OpenSSL 0.9.7 branch:
Update to version 0.9.7m or later.
OpenSSL 0.9.8 branch:
Update to version 0.9.8f or later.
Provided and/or discovered by:
1, 2) Dr. S. N. Henson, Open Network Security
3, 4) Tavis Ormandy and Will Drewry, Google Security Team
Changelog:
2006-09-29: Updated advisory with additional information. Increased criticality. Added links to US-CERT vulnerability notes.
2007-09-28: Updated "Solution" section with additional information about an off-by-one error in "SSL_get_shares_ciphers()" provided by Moritz Jodeit. Updated "Original Advisory" section.
2007-10-01: Added CVE reference.
2007-10-12: Updated "Solution" section. Added link to OpenSSL advisory.
Original Advisory:
http://www.openssl.org/news/secadv_20060928.txt
http://www.openssl.org/news/secadv_20071012.txt
http://archives.neohapsis.com/archives/bugtraq/2007-09/
http://marc.info/?l=openssl-cvs&m=119020417919619&w=2
Other References:
US-CERT VU#247744:
http://www.kb.cert.org/vuls/id/247744
US-CERT VU#386964:
http://www.kb.cert.org/vuls/id/386964
US-CERT VU#423396:
http://www.kb.cert.org/vuls/id/423396
US-CERT VU#547300:
http://www.kb.cert.org/vuls/id/547300
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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