Apache mod_auth_kerb off-by-one buffer overflow
| apache-modauthkerb-offbyone-bo (30456) |  High Risk |
Description:
The mod_auth_kerb module for Apache is vulnerable to an off-by-one buffer overflow, caused by improper bounds checking by the der_get_oid() function in spnegokrb5/der_get.c. By sending a specially-crafted Kerberos message, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the server to crash.
*CVSS:
| Base Score: | 10 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 8.3 |
| Exploitability: | Functional |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
For Red Hat Linux:
Refer to RHSA-2006:0746-2 for patch, upgrade, or suggested workaround information. See References.
References:
- Red Hat Bugzilla Bug 206736: CVE-2006-5989 mod_auth_kerb segfaults when talking to newest KRB5 libs.
- Red Hat Bugzilla Bug 216482: CVE-2006-5989 mod_auth_kerb segfault with FC6 client.
- ASA-2006-270: mod_auth_kerb security update (RHSA-2006-0746)
- BID-21214: Apache Mod_Auth_Kerb Off-By-One Denial of Service Vulnerability
- CVE-2006-5989: Off-by-one error in the der_get_oid function in mod_auth_kerb 5.0 allows remote attackers to cause a denial of service (crash) via a crafted Kerberos message that triggers a heap-based buffer overflow in the component array.
- DSA-1247: libapache-mod-auth-kerb -- heap overflow
- GLSA-200701-14: Mod_auth_kerb: Denial of Service
- MDKSA-2006:218: Updated apache-mod_auth_kerb packages fixes DoS vulnerability
- RHSA-2006-0746: Low: mod_auth_kerb security update
- SA23023: mod_auth_kerb "der_get_oid()" Off-By-One Vulnerability
- SECTRACK ID: 1017348: mod_auth_kerb Off-by-one Overflow Lets Remote Users Deny Service
- VUPEN/ADV-2006-4633: mod_auth_kerb for Apache der_get_oid() Off-By-One Buffer Overflow Vulnerability
Platforms Affected:
- Debian Debian Linux 3.1
- Gentoo Linux
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- mod_auth_kerb 5.x (module for Apache) mod_auth_kerb 5.x (module for Apache) 5.x
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 Desktop
Reported:
Nov 21, 2006
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For corrections or additions please email xforce@iss.net
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.