NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

BID:29656

Info

NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

Bugtraq ID: 29656
Class: Boundary Condition Error
CVE: CVE-2008-2719
Remote: Yes
Local: No
Published: May 21 2008 12:00AM
Updated: Sep 30 2008 10:38PM
Credit: Philipp Thomas
Vulnerable: Ubuntu Ubuntu Linux 8.04 LTS sparc
Ubuntu Ubuntu Linux 8.04 LTS powerpc
Ubuntu Ubuntu Linux 8.04 LTS lpia
Ubuntu Ubuntu Linux 8.04 LTS i386
Ubuntu Ubuntu Linux 8.04 LTS amd64
NASM NASM 2.0.2
NASM NASM 2.0.1
NASM NASM 2.0
Mandriva Linux Mandrake 2008.1 x86_64
Mandriva Linux Mandrake 2008.1
Not Vulnerable: NASM NASM 2.0.3

Discussion

NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

NASM is prone to an off-by-one buffer-overflow vulnerability because the application fails to perform adequate boundary checks on user-supplied data.

Successfully exploiting this issue will allow attackers to execute arbitrary code within the context of the affected application. Failed exploit attempts will result in a denial-of-service condition.

NASM 2.02 and prior versions are vulnerable.

Exploit / POC

NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

A proof of concept causing a crash is available. Symantec has not tested or verified this code.

Solution / Fix

NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

Solution:
The vendor has released fixes. Please see the references for more information.


Ubuntu Ubuntu Linux 8.04 LTS i386

Ubuntu Ubuntu Linux 8.04 LTS amd64

Ubuntu Ubuntu Linux 8.04 LTS powerpc

Ubuntu Ubuntu Linux 8.04 LTS sparc

Ubuntu Ubuntu Linux 8.04 LTS lpia

References

NASM 'ppscan()' Off-By-One Buffer Overflow Vulnerability

References:

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