lrzip 0.641 stream.c ucompthread use after free

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in lrzip 0.641. It has been declared as critical. This affects the function ucompthread of the file stream.c. Such manipulation leads to use after free. This vulnerability is traded as CVE-2021-33453. There is no exploit available.

Detailsinfo

A vulnerability was found in lrzip 0.641. It has been rated as critical. Affected by this issue is the function ucompthread of the file stream.c. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in lrzip version 0.641. There is a use-after-free in ucompthread() in stream.c:1538.

The weakness was shared 07/26/2022 as 199. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2021-33453 since 05/20/2021. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 257991 (Linux Distros Unpatched Vulnerability : CVE-2021-33453), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (257991). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.6

VulDB Base Score: 5.5
VulDB Temp Score: 5.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 257991
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-33453

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/20/2021 🔍
07/26/2022 +432 days 🔍
07/26/2022 +0 days 🔍
08/29/2025 +1130 days 🔍

Sourcesinfo

Advisory: 199
Status: Confirmed

CVE: CVE-2021-33453 (🔍)
GCVE (CVE): GCVE-0-2021-33453
GCVE (VulDB): GCVE-100-205064

Entryinfo

Created: 07/26/2022 18:50
Updated: 08/29/2025 05:58
Changes: 07/26/2022 18:50 (39), 08/27/2022 11:42 (11), 08/29/2025 05:58 (16)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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