4.6 - USN-128-1

Executive Summary

Summary
Title	nasm vulnerability

Informations
Name	USN-128-1	First vendor Publication	2005-05-17
Vendor	Ubuntu	Last vendor Modification	2005-05-17
Severity (Vendor)	N/A	Revision	N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score	NA
Base Score	NA	Environmental Score	NA
impact SubScore	NA	Temporal Score	NA
Exploitabality Sub Score	NA

Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score	4.6	Attack Range	Local
Cvss Impact Score	6.4	Attack Complexity	Low
Cvss Expoit Score	3.9	Authentication	None Required
Calculate full CVSS 2.0 Vectors scores

Detail

A security issue affects the following Ubuntu releases:

Ubuntu 4.10 (Warty Warthog) Ubuntu 5.04 (Hoary Hedgehog)

The following packages are affected:

nasm

The problem can be corrected by upgrading the affected package to version 0.98.38-1ubuntu0.2 (for Ubuntu 4.10), or 0.98.38-1.1ubuntu0.1 (for Ubuntu 5.04). In general, a standard system upgrade is sufficient to effect the necessary changes.

Details follow:

Josh Bressers discovered a buffer overflow in the ieee_putascii() function of nasm. If an attacker tricked a user into assembling a malicious source file, they could exploit this to execute arbitrary code with the privileges of the user that runs nasm.