|
 |
|
Kerberos Multiple Vulnerabilities
|
|
|
|
|
Secunia Advisory:
|
SA25800
|
|
|
Release Date:
|
2007-06-27
|
|
|
Critical:
|
Highly critical
|
|
Impact:
|
DoS
System access
|
|
Where:
|
From remote
|
|
Solution Status:
|
Vendor Workaround
|
|
| Software: | Kerberos 5.x
|
| | CVE reference: | CVE-2007-2442 (Secunia mirror)
CVE-2007-2443 (Secunia mirror)
CVE-2007-2798 (Secunia mirror)
|
|
|
|
|
|
Description:
Some vulnerabilities have been reported in Kerberos, which can be exploited by malicious users and malicious people to compromise a vulnerable system.
1) An error exists within the "gssrpc__svcauth_gssapi" function in the RPC library, which can cause kadmind and possibly other third-party products to free an uninitialised pointer when receiving an RPC credential with a length of zero.
2) A signedness error exists within the "gssrpc__svcauth_unix()" function in the RPC library, which is used by kadmind and possibly other third-party products. This can be exploited to cause a stack-based buffer overflow.
Successful exploitation of vulnerability #1 and #2 potentially allows execution of arbitrary code.
3) A boundary error exists in kadmind within the "rename_principal_2_svc()" function and can be exploited to cause a stack-based buffer overflow.
Successful exploitation allows execution of arbitrary code but requires valid user credentials.
The vulnerabilities are reported in krb5-1.6.1. Other versions may also be affected.
Solution:
Apply patches (see vendor advisories for details).
http://web.mit.edu/kerberos/advisories/2007-004-patch.txt
http://web.mit.edu/kerberos/advisories/2007-004-patch.txt.asc
http://web.mit.edu/kerberos/advisories/2007-005-patch.txt
http://web.mit.edu/kerberos/advisories/2007-005-patch.txt.asc
Provided and/or discovered by:
1, 2) The vendor credits Wei Wang, McAfee Avert Labs.
3) An anonymous person, reported via iDefense Labs.
Original Advisory:
Kerberos:
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-004.txt
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-005.txt
iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=548
Other References:
US-CERT VU#356961:
http://www.kb.cert.org/vuls/id/356961
US-CERT VU#365313:
http://www.kb.cert.org/vuls/id/365313
US-CERT VU#554257:
http://www.kb.cert.org/vuls/id/554257
|
|
|
|
|
Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
|
|
|
|
19 Related Secunia Security Advisories, displaying 10
|
|
|
1. Kerberos Multiple Vulnerabilities
|
|
2. Kerberos Multiple Vulnerabilities
|
|
3. Kerberos Multiple Vulnerabilities
|
|
4. Kerberos kadmind xprt->xp_auth Code Execution Vulnerability
|
|
5. Kerberos kadmind "mechglue" Code Execution Vulnerability
|
|
6. Kerberos V5 setuid Security Issue
|
|
7. Kerberos V5 Multiple Vulnerabilities
|
|
8. Kerberos V5 Telnet Client Information Disclosure Weakness
|
|
9. MIT Kerberos Telnet Client Buffer Overflow Vulnerabilities
|
|
10. Kerberos V5 "libkadm5srv" Buffer Overflow Vulnerability
|
Show all related advisories
|
|
|
Send Feedback to Secunia
|
|
If you have new information regarding this Secunia advisory or a product in our database, please send it to us using either our web form or email us at vuln@secunia.com.
Ideas, suggestions, and other feedback are most welcome.
|
|
|
|
|
|
Secunia PSI
Scan | Patch | Track
Free Download
|
|
|
Secunia Poll
|
|
|
|
|
 |
|
|
Most Popular Advisories
|
|
|
|
|
|
