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[gentoo-security] GLSA: cyrus-sasl
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Joined: 16 Apr 2002
Posts: 18350

PostPosted: Fri Dec 27, 2002 11:01 pm    Post subject: [gentoo-security] GLSA: cyrus-sasl Reply with quote

Daniel Ahlberg wrote:
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PACKAGE : cyrus-sasl
SUMMARY : buffer overflows
DATE : 2002-12-27 22:12 UTC
EXPLOIT : remote

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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. Probably hard to exploit, although you can affect the logging data with at least anonymous authentication."

Read the full advisory at


It is recommended that all Gentoo Linux users who are running ev-libs/cyrus-sasl-2.1.9 update their systems as follows:

emerge rsync
emerge cyrus-sasl
emerge clean

- - -------------------------------------------------------------------- - GnuPG key is available at
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