Fedora Directory Server LDAP bad BER sequence denial of service
| fedora-ber-bad-sequence-dos (24795) |  Medium Risk |
Description:
Fedora Directory Server is vulnerable to a denial of service attack caused by improper handling of invalid BER sequences by the LDAP (Lightweight Directory Access Protocol) component. A remote attacker could exploit this vulnerability by sending multiple invalid BER packets to cause uninitialized memory to be freed, resulting in a system crash.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Refer to the Fedora Web site for patch, upgrade, or suggested workaround information. See References.
References:
- Fedora Project Web site: Fedora Dirctory Server Project.
- GLEG Ltd. Web site: ProtoVer LDAP testsuite.
- Red Hat Bugzilla Bug 179135: CVE-2006-0451 memory leaks using ber_scanf when handling bad BER packets (CVE-2006-0453).
- BID-16677: Fedora Directory Server Multiple Remote Denial Of Service Vulnerabilities
- CVE-2006-0453: The LDAP component in Fedora Directory Server 1.0 allow remote attackers to cause a denial of service (crash) via a certain bad BER sequence that results in a free of uninitialized memory, as demonstrated using the ProtoVer LDAP test suite.
- RHSA-2006-0270: Red Hat Directory Server 7.1 security update
- SA18960: Fedora Directory Server LDAP Denial of Service Vulnerabilities
Platforms Affected:
- RedHat Directory Server 7.1
- RedHat Fedora Directory Server 1.0
Reported:
Feb 14, 2006
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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.