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OpenBSD 2.4 Remote Crash Vulnerability



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General Info


TC: 12021
Description: This test identifies OpenBSD 2.4 or earlier.
It has been demonstrated that this OS can be crashed remotely using malformed packets that start an internal kernel race condition.
TC Impact: Gather Info
Service: telnet



Specific Operations and Actions:


Vulnerability Publication: February 1999
Advisory Copyright: N.A.
Summary: The TCP/IP stack of this system has a flaw that may lead to a system crash via malformed packets.
Risk: Low
CVSS 2.0 metrics: Access Vector: Network
Access Complexity: High
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Partial
CVSS 2.0 Base Score: 2.6
Vulnerability Impact: Crash
Host Impact: An attacker could crash the system.
Nature of Remediation: Obtain patches.
Step required to fix the reported vulnerability:

***** Solution type: Upgrade Software *****

Get latest OpenBSD kernel.
Patches for 2.4 also exist.



Glossary and References :


References:
* OPENBSD: Feb19,1999
http://www.openbsd.org/errata24.html#ipqrace
* XF: openbsd-ipintr-race
http://xforce.iss.net/xforce/xfdb/1829
* OSVDB: 7558
http://www.osvdb.org/7558

CVE Link: CVE-1999-0485
CVE Compatible

Glossary: Crash
Denial of Service
Race Condition


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