IP fragment reassembly code can be tricked to cause kernel panic

freebsd-ip-frag-dos (1389) The risk level is classified as MediumMedium Risk

Description:

The IP fragment reassembly code in FreeBSD is vulnerable to a denial of service attack that can lead to a kernel panic. An attacker can send malformed IP packets to the FreeBSD device where the reassembly code assembles them into an invalid UDP datagram to cause the kernel to panic and crash. The system must be restarted to regain normal functionality.

*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:

For FreeBSD 3.0:
Upgrade to the latest version of FreeBSD (3.0 dated 1998/10/27 or later), as listed in FreeBSD Security Advisory FreeBSD-SA-98:08. See References.

For FreeBSD-current dated prior to 1998/10/27:
Upgrade to the latest version of FreeBSD (FreeBSD-current dated 1998/10/27 or later), as listed in FreeBSD Security Advisory FreeBSD-SA-98:08. See References.

References:

Platforms Affected:

  • FreeBSD FreeBSD 3.0
  • FreeBSD FreeBSD CURRENT

Reported:

Nov 04, 1998

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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.

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