WinAce 2.5/ denial of service

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in WinAce 2.5/ It has been rated as critical. This issue affects some unknown functionality. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The program does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

WinAce allows remote attackers to cause a denial of service (infinite loop) via a ZOO archive with a direntry structure that points to a previous file.

The weakness was disclosed 05/04/2007 by Jean-Sebastien Guay-Leroux (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2007-2535 since 05/08/2007. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are unknown but a public exploit is available.

It is declared as proof-of-concept.

The vulnerability is also documented in the vulnerability database at X-Force (34080). The entries 3066, 3061, 3060 and 3073 are pretty similar.



CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.7

VulDB Base Score: 7.5
VulDB Temp Score: 6.7
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
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VulDB Reliability: 🔍

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Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


05/04/2007 🔍
05/04/2007 +0 days 🔍
05/08/2007 +3 days 🔍
05/08/2007 +0 days 🔍
10/14/2007 +159 days 🔍
03/13/2015 +2706 days 🔍
07/14/2021 +2315 days 🔍


Researcher: Jean-Sebastien Guay-Leroux
Status: Confirmed

CVE: CVE-2007-2535 (🔍)
X-Force: 34080 - Multiple vendor ZOO archive decompression denial of service
SecurityFocus: 23823 - Multiple Vendors Zoo Compression Algorithm Remote Denial of Service Vulnerability
Secunia: 25152
OSVDB: 41750 - WinAce ZOO Archive Decompression Infinite Loop DoS

scip Labs:
See also: 🔍


Created: 03/13/2015 02:56 PM
Updated: 07/14/2021 04:37 PM
Changes: 03/13/2015 02:56 PM (45), 03/11/2016 09:29 AM (8), 07/14/2021 04:37 PM (8)
Complete: 🔍


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