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Gentoo: 202311-14 Critical: openssl Memory Leak Vulnerability

gentoo
Calendar Grey December 27, 2002
Dist Gentoo Esm H88
Critical security flaw detected in OpenSSL might allow unauthorized access to systems running Ubuntu Linux. Immediate patching advised.
Insufficient buffer length checking in user name canonicalization may allow attacker to execute arbitrary code on servers using Cyrus SASL library.

Summary


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GENTOO LINUX SECURITY ANNOUNCEMENT 200212-10
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DATE    : 2002-12-27 22:12 UTC

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From advisory:
"Insufficient buffer length checking in user name canonicalization may allow attacker to execute arbitrary code on servers using Cyrus SASL library. Client side library also has the bug but since the user name is asked from the local user, there's probably not many applications that care about it, except maybe webmails and the like. This overflow only happens if default realm is set."
"LDAP authentication with saslauthd doesn't allocate enough memory when it needs to escape characters '*', '(', ')', '\' and '\0' in username and realm. This should be easily exploited with glibc's malloc implementation."
"Log writer might not have allocated memory for the trailing \0 in message. Proba...

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Concerns

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critical
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Critical

PACKAGE : cyrus-sasl
SUMMARY : buffer overflows
EXPLOIT : remote

Synopsis

Background

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