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GNU libc regcomp() stack exhaustion denial of service

Vulnerability Note VU#912279

Original Release Date: 2010-12-07 | Last Revised: 2010-12-08

Overview

The regcomp() function of GNU libc is susceptible to stack exhaustion which may result in a denial of service.

Description

It is possible to trigger deep recursion which results in stack exhaustion. An example trigger is: grep -E ".*{10,}{10,}{10,}{10,}{10,}"

Impact

An attacker may be able to trigger a denial of service in applications that accept regular expressions.

Solution

We are currently unaware of a practical solution to this problem.

Vendor Information

912279
 
Affected   Unknown   Unaffected

Debian GNU/Linux

Notified:  October 22, 2010 Updated:  December 07, 2010

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Gentoo Linux

Notified:  October 22, 2010 Updated:  December 07, 2010

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Red Hat, Inc.

Notified:  October 22, 2010 Updated:  December 07, 2010

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Slackware Linux Inc.

Notified:  October 22, 2010 Updated:  December 07, 2010

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Ubuntu

Notified:  October 22, 2010 Updated:  December 07, 2010

Status

  Affected

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

Thanks to Maksymilian Arciemowicz for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

CVE IDs: CVE-2010-4051, CVE-2010-4052
Severity Metric: 0.18
Date Public: 2010-12-07
Date First Published: 2010-12-07
Date Last Updated: 2010-12-08 20:06 UTC
Document Revision: 13

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