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Publish-It 3.6d Buffer Overflow

Publish-It 3.6d Buffer Overflow
Posted Feb 6, 2014
Authored by Core Security Technologies, Daniel Kazimirow | Site coresecurity.com

Publish-It is prone to a (client side) security vulnerability when processing .PUI files. This vulnerability could be exploited by a remote attacker to execute arbitrary code on the target machine, by enticing the user of Publish-It to open a specially crafted .PUI file. Version 3.6d is affected.

tags | exploit, remote, arbitrary
advisories | CVE-2014-0980
SHA-256 | 4f00b02a79e23f09d447c39b8a1b5c407205e7628691b494b32c0036916b057d

Publish-It 3.6d Buffer Overflow

Change Mirror Download
Core Security - Corelabs Advisory

Publish-It Buffer Overflow Vulnerability

1. *Advisory Information*

Title: Publish-It Buffer Overflow Vulnerability
Advisory ID: CORE-2014-0001
Advisory URL:
Date published: 2014-02-05
Date of last update: 2014-02-05
Vendors contacted: Poster Software
Release mode: User release

2. *Vulnerability Information*

Class: Buffer overflow [CWE-119]
Impact: Code execution
Remotely Exploitable: No
Locally Exploitable: Yes
CVE Name: CVE-2014-0980

3. *Vulnerability Description*

Publish-It [1] is prone to a (client side) security vulnerability when
processing .PUI files. This vulnerability could be exploited by a remote
attacker to execute arbitrary code on the target machine, by enticing
the user of Publish-It to open a specially crafted .PUI file.

4. *Vulnerable Packages*

. Publish-It v3.6d for Win XP.
. Publish-It v3.6d for Win 7.
. Other versions are probably affected too, but they were not checked.

5. *Vendor Information, Solutions and Workarounds*

There was no official answer from vendor after several attempts to
report this vulnerability (see [Sec. 8]). As mitigation action, given
that this is a client-side vulnerability, avoid to open untrusted .PUI
files. Contact vendor for further information.

6. *Credits*

This vulnerability was discovered and researched by Daniel Kazimirow
from Core Exploit Writers Team.

7. *Technical Description / Proof of Concept Code*

Below is shown the result of opening the Proof of concept file [2] on
Windows XP SP3 (EN).

EAX 04040404
ECX 00000325
EBX 77F15B70 GDI32.SelectObject
ESP 0012F5D4
EBP 77F161C1 GDI32.GetStockObject
ESI 0103A1E8
EDI A50107D3
EIP 04040404
C 0 ES 0023 32bit 0(FFFFFFFF)
P 0 CS 001B 32bit 0(FFFFFFFF)
A 1 SS 0023 32bit 0(FFFFFFFF)
Z 0 DS 0023 32bit 0(FFFFFFFF)
S 0 FS 003B 32bit 7FFDF000(FFF)
T 0 GS 0000 NULL
D 0
O 0 LastErr ERROR_SUCCESS (00000000)
EFL 00000212 (NO,NB,NE,A,NS,PO,GE,G)
ST0 empty -??? FFFF 00000001 00010002
ST1 empty -??? FFFF 00000043 004F007A
ST2 empty -??? FFFF 7590A3E7 FDBDC8F2
ST3 empty -??? FFFF 00000043 0050007B
ST4 empty 1.0000000000000000000
ST5 empty -9.2233720368547758080e+18

The arbitrary value 0x04040404 is stored in the EIP register where our
shellcode starts (just a software breakpoint 0xCC):

04040404 CC INT3
04040405 CC INT3
04040406 CC INT3
04040407 CC INT3
04040408 CC INT3
04040409 CC INT3
0404040A CC INT3
0404040B CC INT3

As a result, the normal execution flow can be altered in order to
execute arbitrary code.

8. *Report Timeline*

. 2013-12-20:
Core Security Technologies attempts to contact vendor. Publication date
is set for Jan 21st, 2014.

. 2014-01-06:
Core attempts to contact vendor.

. 2014-01-15:
Core asks for confirmation of the initial contact e-mail.

. 2014-01-15:
Vendor sends an e-mail with a single word: "Confirmed".

. 2014-01-16:
Core sends a technical description and asks for an estimated release
date. No reply received.

. 2014-01-21:
First release date missed.

. 2014-01-27:
Core attempts to contact vendor. No reply received.

. 2014-02-05:
After one month and a half trying to contact vendor the only reply from
them was the word "Confirmed" and the advisory CORE-2014-0001 is
published as 'User release'.

9. *References*

[1] http://www.postersw.com/.

10. *About CoreLabs*

CoreLabs, the research center of Core Security Technologies, is charged
with anticipating the future needs and requirements for information
security technologies. We conduct our research in several important
areas of computer security including system vulnerabilities, cyber
attack planning and simulation, source code auditing, and cryptography.
Our results include problem formalization, identification of
vulnerabilities, novel solutions and prototypes for new technologies.
CoreLabs regularly publishes security advisories, technical papers,
project information and shared software tools for public use at:

11. *About Core Security Technologies*

Core Security Technologies enables organizations to get ahead of threats
with security test and measurement solutions that continuously identify
and demonstrate real-world exposures to their most critical assets. Our
customers can gain real visibility into their security standing, real
validation of their security controls, and real metrics to more
effectively secure their organizations.

Core Security's software solutions build on over a decade of trusted
research and leading-edge threat expertise from the company's Security
Consulting Services, CoreLabs and Engineering groups. Core Security
Technologies can be reached at +1 (617) 399-6980 or on the Web at:

12. *Disclaimer*

The contents of this advisory are copyright (c) 2014 Core Security
Technologies and (c) 2014 CoreLabs, and are licensed under a Creative
Commons Attribution Non-Commercial Share-Alike 3.0 (United States)
License: http://creativecommons.org/licenses/by-nc-sa/3.0/us/

13. *PGP/GPG Keys*

This advisory has been signed with the GPG key of Core Security
Technologies advisories team, which is available for download at

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