GLSA Bodhisattva
Joined: 25 Feb 2003 Posts: 3829 Location: Essen, Germany
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Posted: Mon Dec 20, 2004 1:59 pm Post subject: [ GLSA 200412-20 ] NASM: Buffer overflow vulnerability |
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Gentoo Linux Security Advisory
Title: NASM: Buffer overflow vulnerability (GLSA 200412-20)
Severity: normal
Exploitable: remote
Date: December 20, 2004
Bug(s): #74477
ID: 200412-20
Synopsis
NASM is vulnerable to a buffer overflow that allows an attacker to execute arbitrary code through the use of a malicious object file.
Background
NASM is a 80x86 assembler that has been created for portability and modularity. NASM supports Pentium, P6, SSE MMX, and 3DNow extensions. It also supports a wide range of objects formats (ELF, a.out, COFF, ...), and has its own disassembler.
Affected Packages
Package: dev-lang/nasm
Vulnerable: <= 0.98.38
Unaffected: >= 0.98.38-r1
Architectures: All supported architectures
Description
Jonathan Rockway discovered that NASM-0.98.38 has an unprotected vsprintf() to an array in preproc.c. This code vulnerability may lead to a buffer overflow and potential execution of arbitrary code.
Impact
A remote attacker could craft a malicious object file which, when supplied in NASM, would result in the execution of arbitrary code with the rights of the user running NASM.
Workaround
There is no known workaround at this time.
Resolution
All NASM users should upgrade to the latest version: Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=dev-lang/nasm-0.98.38-r1" |
References
Original Advisory
Last edited by GLSA on Sun May 07, 2006 4:54 pm; edited 1 time in total |
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