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Vulnerability Assessment & Network Security Forums |
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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery. Home >> Browse Vulnerability Assessment Database >> Gentoo Local Security Checks >> [GLSA-200403-03] Multiple OpenSSL Vulnerabilities Vulnerability Assessment Details
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[GLSA-200403-03] Multiple OpenSSL Vulnerabilities |
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Multiple OpenSSL Vulnerabilities Detailed Explanation for this Vulnerability Assessment The remote host is affected by the vulnerability described in GLSA-200403-03 (Multiple OpenSSL Vulnerabilities) Testing performed by the OpenSSL group using the Codenomicon TLS Test Tool uncovered a null-pointer assignment in the do_change_cipher_spec() function. A remote attacker could perform a carefully crafted SSL/TLS handshake against a server that used the OpenSSL library in such a way as to cause OpenSSL to crash. Depending on the application this could lead to a denial of service. All versions of OpenSSL from 0.9.6c to 0.9.6l inclusive and from 0.9.7a to 0.9.7c inclusive are affected by this issue. A flaw has been discovered in SSL/TLS handshaking code when using Kerberos ciphersuites. A remote attacker could perform a carefully crafted SSL/TLS handshake against a server configured to use Kerberos ciphersuites in such a way as to cause OpenSSL to crash. Most applications have no ability to use Kerberos cipher suites and will therefore be unaffected. Versions 0.9.7a, 0.9.7b, and 0.9.7c of OpenSSL are affected by this issue. Testing performed by the OpenSSL group using the Codenomicon TLS Test Tool uncovered a bug in older versions of OpenSSL 0.9.6 that can lead to a Denial of Service attack (infinite loop). This issue was traced to a fix that was added to OpenSSL 0.9.6d some time ago. This issue will affect vendors that ship older versions of OpenSSL with backported security patches. Impact Although there are no public exploits known for bug, users are recommended to upgrade to ensure the security of their infrastructure. Workaround There is no immediate workaround a software upgrade is required. The vulnerable function in the code has been rewritten. Solution: All users are recommened to upgrade openssl to either 0.9.7d or 0.9.6m: # emerge sync # emerge -pv ">=dev-libs/openssl-0.9.7d" # emerge ">=dev-libs/openssl-0.9.7d" Network Security Threat Level: Medium Networks Security ID: Vulnerability Assessment Copyright: (C) 2005 Michel Arboi |
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