VDB-233331 · CVE-2021-32495 · Issue 18666

Radare2 Pyc Parser get_none_object use after free

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.
8.0	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Radare2. It has been rated as problematic. Affected is the function get_none_object of the component Pyc Parser. Performing a manipulation results in use after free. This vulnerability is identified as CVE-2021-32495. The attack can be initiated remotely. There is not any exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Radare2 (Programming Tool Software) (version unknown). It has been classified as problematic. This affects the function get_none_object of the component Pyc Parser. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on availability. The summary by CVE is:

Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory afterwards. This will allow attackers to cause denial of service.

The weakness was released 07/08/2023 as 18666. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2021-32495 since 05/10/2021. Technical details of the vulnerability are known, but there is no available exploit.

Applying the patch 5e16e2d1c9fe245e4c17005d779fde91ec0b9c05 is able to eliminate this problem. The bugfix is ready for download at github.com.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Programming Tool Software

Name

Radare2

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 8.0

VulDB Base Score: 5.3
VulDB Temp Score: 4.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CNA Base Score: 10.0
CNA Vector (Fedora Project): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
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
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: 5e16e2d1c9fe245e4c17005d779fde91ec0b9c05

Timelineinfo

05/10/2021 🔍
07/08/2023 +789 days 🔍
07/08/2023 +0 days 🔍
07/25/2023 +17 days 🔍

Sourcesinfo

Advisory: 18666
Status: Not defined

CVE: CVE-2021-32495 (🔍)
GCVE (CVE): GCVE-0-2021-32495
GCVE (VulDB): GCVE-100-233331

Entryinfo

Created: 07/08/2023 08:38
Updated: 07/25/2023 16:31
Changes: 07/08/2023 08:38 (51), 07/25/2023 16:31 (12)
Complete: 🔍
Cache ID: 216::103