Mandrake Linux Security Advisory : krb5 (MDKSA-2005:119)

This script is Copyright (C) 2005-2016 Tenable Network Security, Inc.


Synopsis :

The remote Mandrake Linux host is missing one or more security
updates.

Description :

A number of vulnerabilities have been corrected in this Kerberos
update :

The rcp protocol would allow a server to instruct a client to write to
arbitrary files outside of the current directory. The Kerberos-aware
rcp could be abused to copy files from a malicious server
(CVE-2004-0175).

Gael Delalleau discovered an information disclosure vulnerability in
the way some telnet clients handled messages from a server. This could
be abused by a malicious telnet server to collect information from the
environment of any victim connecting to the server using the Kerberos-
aware telnet client (CVE-2005-0488).

Daniel Wachdorf disovered that in error conditions that could occur in
response to correctly-formatted client requests, the Kerberos 5 KDC
may attempt to free uninitialized memory, which could cause the KDC to
crash resulting in a Denial of Service (CVE-2005-1174).

Daniel Wachdorf also discovered a single-byte heap overflow in the
krb5_unparse_name() function that could, if successfully exploited,
lead to a crash, resulting in a DoS. To trigger this flaw, an attacker
would need to have control of a Kerberos realm that shares a cross-
realm key with the target (CVE-2005-1175).

Finally, a double-free flaw was discovered in the krb5_recvauth()
routine which could be triggered by a remote unauthenticated attacker.
This issue could potentially be exploited to allow for the execution
of arbitrary code on a KDC. No exploit is currently known to exist
(CVE-2005-1689).

The updated packages have been patched to address this issue and
Mandriva urges all users to upgrade to these packages as quickly as
possible.

See also :

http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-002-kdc.txt
http://www.nessus.org/u?20d6a900

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: Mandriva Local Security Checks

Nessus Plugin ID: 19201 (mandrake_MDKSA-2005-119.nasl)

Bugtraq ID:

CVE ID: CVE-2004-0175
CVE-2005-0488
CVE-2005-1174
CVE-2005-1175
CVE-2005-1689

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