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Mandrake Linux Security Advisory : krb5 (MDKSA-2005:119)
high Nessus Plugin ID 19201
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.
Solution
Update the affected packages.See Also
http://www.nessus.org/u?20d6a900
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2005-002-kdc.txt
Plugin Details
Severity: High
ID: 19201
File Name: mandrake_MDKSA-2005-119.nasl
Version: 1.21
Type: local
Family: Mandriva Local Security Checks
Published: 7/14/2005
Updated: 1/6/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.7
CVSS v2
Risk Factor: High
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Vulnerability Information
CPE: cpe:/o:mandrakesoft:mandrake_linux:10.0, cpe:/o:mandrakesoft:mandrake_linux:10.1, x-cpe:/o:mandrakesoft:mandrake_linux:le2005, p-cpe:/a:mandriva:linux:ftp-client-krb5, p-cpe:/a:mandriva:linux:ftp-server-krb5, p-cpe:/a:mandriva:linux:krb5-server, p-cpe:/a:mandriva:linux:krb5-workstation, p-cpe:/a:mandriva:linux:telnet-client-krb5, p-cpe:/a:mandriva:linux:telnet-server-krb5, p-cpe:/a:mandriva:linux:lib64krb51, p-cpe:/a:mandriva:linux:lib64krb51-devel, p-cpe:/a:mandriva:linux:libkrb51, p-cpe:/a:mandriva:linux:libkrb51-devel, p-cpe:/a:mandriva:linux:lib64krb53, p-cpe:/a:mandriva:linux:lib64krb53-devel, p-cpe:/a:mandriva:linux:libkrb53, p-cpe:/a:mandriva:linux:libkrb53-devel
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/Mandrake/release, Host/Mandrake/rpm-list
Patch Publication Date: 7/13/2005
Reference Information
CVE: CVE-2004-0175, CVE-2005-0488, CVE-2005-1174, CVE-2005-1175, CVE-2005-1689