[ GLSA 202003-44 ] Binary diff

[GLSA]

Gentoo Linux Security Advisory

Title: Binary diff: Heap-based buffer overflow (GLSA 202003-44)
Severity: high
Exploitable: local, remote
Date: 2020-03-19
Bug(s): #701848
ID: 202003-44

Synopsis

A heap-based buffer overflow in Binary diff might allow remote
attackers to execute arbitrary code.


Background

bsdiff and bspatch are tools for building and applying patches to binary
files.


Affected Packages

Package: dev-util/bsdiff
Vulnerable: < 4.3-r4
Unaffected: >= 4.3-r4
Architectures: All supported architectures


Description

It was discovered that the implementation of bspatch did not check for a
negative value on numbers of bytes read from the diff and extra streams.


Impact

A remote attacker could entice a user to apply a specially crafted patch
using bspatch, possibly resulting in execution of arbitrary code with the
privileges of the process or a Denial of Service condition.


Workaround

There is no known workaround at this time.

Resolution

All Binary diff users should upgrade to the latest version: