Some vulnerabilities have been reported in Kerberos, which can be exploited by malicious users and malicious people to compromise a vulnerable system.
1) An error exists within the "gssrpc__svcauth_gssapi" function in the RPC library, which can cause kadmind and possibly other third-party products to free an uninitialised pointer when receiving an RPC credential with a length of zero.
2) A signedness error exists within the "gssrpc__svcauth_unix()" function in the RPC library, which is used by kadmind and possibly other third-party products. This can be exploited to cause a stack-based buffer overflow.
Successful exploitation of vulnerability #1 and #2 potentially allows execution of arbitrary code.
3) A boundary error exists in kadmind within the "rename_principal_2_svc()" function and can be exploited to cause a stack-based buffer overflow.
Successful exploitation allows execution of arbitrary code but requires valid user credentials.
The vulnerabilities are reported in krb5-1.6.1. Other versions may also be affected.
Solution: Apply patches (see vendor advisories for details).
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
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Subject: Kerberos Multiple Vulnerabilities
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