VDB-178001 · CVE-2021-32559 · FEYE-2021-0017

pywin32 prior b301 ACE integer overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in pywin32. It has been classified as critical. Affected is an unknown function of the component ACE Handler. The manipulation leads to integer overflow. This vulnerability is documented as CVE-2021-32559. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in pywin32. It has been rated as problematic. This issue affects an unknown code block of the component ACE Handler. The manipulation with an unknown input leads to a integer overflow vulnerability. Using CWE to declare the problem leads to CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. Impacted is availability.

The weakness was released 07/06/2021 as FEYE-2021-0017. The advisory is shared at github.com. The identification of this vulnerability is CVE-2021-32559. Neither technical details nor an exploit are publicly available.

Upgrading to version b301 eliminates this vulnerability. The upgrade is hosted for download at github.com.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

pywin32

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: pywin32 b301

Timelineinfo

05/11/2021 🔍
07/06/2021 +56 days 🔍
07/06/2021 +0 days 🔍
03/27/2025 +1360 days 🔍

Sourcesinfo

Advisory: FEYE-2021-0017
Status: Confirmed

CVE: CVE-2021-32559 (🔍)
GCVE (CVE): GCVE-0-2021-32559
GCVE (VulDB): GCVE-100-178001

Entryinfo

Created: 07/06/2021 16:50
Updated: 03/27/2025 18:35
Changes: 07/06/2021 16:50 (38), 07/10/2021 01:20 (5), 03/27/2025 18:35 (33)
Complete: 🔍
Cache ID: 216::103