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FreeBSD : krb5 -- MITKRB5-SA-2011-002, KDC vulnerable to hang when using LDAP back end (4ab413ea-66ce-11e0-bf05-d445f3aa24f0)
medium Nessus Plugin ID 53440
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Synopsis
The remote FreeBSD host is missing one or more security-related updates.Description
An advisory published by the MIT Kerberos team says :The MIT krb5 Key Distribution Center (KDC) daemon is vulnerable to denial of service attacks from unauthenticated remote attackers.
CVE-2011-0281 and CVE-2011-0282 occur only in KDCs using LDAP back ends, but CVE-2011-0283 occurs in all krb5-1.9 KDCs.
Exploit code is not known to exist, but the vulnerabilities are easy to trigger manually. The trigger for CVE-2011-0281 has already been disclosed publicly, but that fact might not be obvious to casual readers of the message in which it was disclosed. The triggers for CVE-2011-0282 and CVE-2011-0283 have not yet been disclosed publicly, but they are also trivial.
CVE-2011-0281: An unauthenticated remote attacker can cause a KDC configured with an LDAP back end to become completely unresponsive until restarted.
CVE-2011-0282: An unauthenticated remote attacker can cause a KDC configured with an LDAP back end to crash with a NULL pointer dereference.
CVE-2011-0283: An unauthenticated remote attacker can cause a krb5-1.9 KDC with any back end to crash with a NULL pointer dereference.
Solution
Update the affected packages.See Also
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-002.txt
Plugin Details
Severity: Medium
ID: 53440
File Name: freebsd_pkg_4ab413ea66ce11e0bf05d445f3aa24f0.nasl
Version: 1.12
Type: local
Family: FreeBSD Local Security Checks
Published: 4/15/2011
Updated: 1/6/2021
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3.6
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Vulnerability Information
CPE: p-cpe:/a:freebsd:freebsd:krb5, cpe:/o:freebsd:freebsd
Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info
Patch Publication Date: 4/14/2011
Vulnerability Publication Date: 2/8/2011