Home / vulnerabilities Secunia Security Advisory 43260
Posted on 10 February 2011
Source : packetstormsecurity.org Link
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TITLE:
Kerberos Multiple Denial of Service Vulnerabilities
SECUNIA ADVISORY ID:
SA43260
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RELEASE DATE:
2011-02-10
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http://secunia.com/advisories/43260/
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DESCRIPTION:
Some vulnerabilities have been reported in Kerberos, which can be
exploited by malicious people to cause a DoS (Denial of Service).
1) The KDC database propagation daemon (kpropd) listening process
does not properly handle the abnormal termination of worker
processes, which can be exploited to terminate the daemon by sending
specially crafted data.
Successful exploitation requires that kpropd runs in standalone mode
("-S" option).
The vulnerability is reported in krb5-1.7, krb5-1.8, and krb5-1.9.
2) An error when processing certain Kerberos principal names in the
KDC LDAP database back end can lead to file descriptor leaks, which
can be exploited to cause KDC to hang by sending specially crafted
requests.
The vulnerability is reported in krb5-1.6 and later.
3) A NULL pointer dereference error when processing certain Kerberos
principal names exists in the KDC LDAP back end, which can be
exploited to cause a crash by sending specially crafted requests.
The vulnerability is reported in krb5-1.6 and later.
4) A NULL pointer dereference error within the KDC network code can
be exploited to cause a crash by sending specially crafted requests
packets.
The vulnerability is reported in krb5-1.9.
SOLUTION:
Apply patches.
PROVIDED AND/OR DISCOVERED BY:
3) Reported by the vendor.
The vendor credits:
1) Keiichi Mori, Red Hat
2) Kevin Longfellow, Oracle
4) Zbysek Mraz, Red Hat
ORIGINAL ADVISORY:
MIT krb5 Security Advisory 2011-001:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-001.txt
MIT krb5 Security Advisory 2011-002:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-002.txt
OTHER REFERENCES:
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EXTENDED SOLUTION:
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EXPLOIT:
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