JZLib Denial Of Service Vulnerability

BID:4359

Info

JZLib Denial Of Service Vulnerability

Bugtraq ID: 4359
Class: Design Error
CVE:
Remote: Yes
Local: Yes
Published: Mar 18 2002 12:00AM
Updated: Mar 18 2002 12:00AM
Credit: Discovery of this issue is credited to the JZlib development team.
Vulnerable: JCraft JZlib 0.0.6
JCraft JZlib 0.0.5
JCraft JZlib 0.0.4
JCraft JZlib 0.0.3
JCraft JZlib 0.0.2
JCraft JZlib 0.0.1
Not Vulnerable: JCraft JZlib 0.0.7

Discussion

JZLib Denial Of Service Vulnerability

JZlib is a re-implementation of the zlib compression library, written entirely in Java. It can be used on most Unix and Linux variants, as well as Microsoft Windows operating systems.

It is possible to crash JZlib with a specially-crafted block of invalid deflated data. This causes a NullPointerException to be thrown. This may cause a denial of service to applications which use the library.

It has not been determined whether this issue may be exploited to execute arbitrary code. Though the possibility seems unlikely.

Exploit / POC

JZLib Denial Of Service Vulnerability

Currently the SecurityFocus staff are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

JZLib Denial Of Service Vulnerability

Solution:
This issue has been addressed in JZlib 0.0.7. Those affected by this vulnerability are advised to upgrade.


JCraft JZlib 0.0.1

JCraft JZlib 0.0.2

JCraft JZlib 0.0.3

JCraft JZlib 0.0.4

JCraft JZlib 0.0.5

JCraft JZlib 0.0.6

References

JZLib Denial Of Service Vulnerability

References:

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