Total Commander File Info plugin vulnerable to denial of service via an out-of-bounds read

Overview

Total Commander’s File Info plugin version 2.21 attempts an out-of-bounds read when reading a file carefully crafted by an attacker.

Description

CWE-125: Out-of-bounds Read - CVE-2015-2869

An attacker that can control the contents of certain file types may be able to cause an out-of-bounds read error in Total Commander File Plugin version 2.21 by specifying overly large values of certain properties. An attacker who successfully exploits this vulnerability may cause the Total Commander application to unexpectedly terminate.

This attack has been noted in at least two different file types due to the software’s improper use of the strncmp function.

* COFF Archive Library (.lib) files may be used by specifying overly large values for the 'Size' field of the Archive Member Header or the "Number Of Symbols" field in the 1st Linker Member.
* Linear Executable files may be used by specifying overly large values for the "Resource Table Count" field of the LE Header or the "Object" field at offset 0x8 from a "Resource Table Entry".

Out-of-bounds reads may allow remote code execution in some circumstances; the CERT/CC is currently unaware of such an attack on the Total Commander File Info plugin, however.

Impact

An attacker may be able to cause the application to terminate.

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Solution

Apply an update

Total Commander File Info plugin has released version 2.22, which addresses this issue. Affected users are encouraged to update as soon as possible

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Vendor Information

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Total Commander File Info Plugin Affected

Updated: July 16, 2015

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base	4.7	AV:L/AC:M/Au:N/C:N/I:N/A:C
Temporal	3.7	E:POC/RL:OF/RC:C
Environmental	0.9	CDP:ND/TD:L/CR:ND/IR:ND/AR:ND

References

• <http://blogs.cisco.com/security/talos/fileinfo-plugin-dos&gt;
• <http://totalcmd.net/plugring/fileinfo.html&gt;

Acknowledgements

Thanks to Cisco TALOS for reporting this vulnerability to us. Cisco Talos credits Marcin Noga for discovering this vulnerability.

This document was written by Garret Wassermann.

Other Information

CVE IDs:	CVE-2015-2869
Date Public:	2015-07-16 Date First Published: