Arch Linux Security Advisory ASA-201604-8
========================================
Severity: High
Date    : 2016-04-14
CVE-ID  : CVE-2016-2347
Package : lhasa
Type    : arbitrary code execution
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package lhasa before version 0.3.1-1 is vulnerable to arbitrary code
execution.

Resolution
=========
Upgrade to 0.3.1-1.

# pacman -Syu "lhasa>=0.3.1-1"

The problems has been fixed upstream in version 0.3.1

Workaround
=========
None.

Description
==========
An exploitable integer underflow exists during calculation size for all
headers in decode_level3_header function of Lhasa (lha) application.

Smaller value of header_len than LEVEL_3_HEADER_LEN ( 32 ) cause during
subtraction integer underflow and lead later to memory corruption via
heap based buffer overflow.

Impact
=====
A remote attacker is able to create a specially crafted LHA archive that
results in a heap based buffer overflow leading to arbitrary code execution.

References
=========
https://talosintelligence.com/vulnerability_reports/TALOS-2016-0095/
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2347

ArchLinux: 201604-8: lhasa: arbitrary code execution

April 14, 2016

Summary

An exploitable integer underflow exists during calculation size for all headers in decode_level3_header function of Lhasa (lha) application. Smaller value of header_len than LEVEL_3_HEADER_LEN ( 32 ) cause during subtraction integer underflow and lead later to memory corruption via heap based buffer overflow.

Resolution

Upgrade to 0.3.1-1. # pacman -Syu "lhasa>=0.3.1-1"
The problems has been fixed upstream in version 0.3.1

References

https://talosintelligence.com/vulnerability_reports/TALOS-2016-0095/ https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2347

Severity
Package : lhasa
Type : arbitrary code execution
Remote : Yes
Link : https://wiki.archlinux.org/title/CVE

Workaround

None.

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