bzip3 up to 1.2.2 libbzip3.a bz3_decode_block out-of-bounds

HistoryDiffrelatejsonxmlCTI

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.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability identified as problematic has been detected in bzip3 up to 1.2.2. Affected by this vulnerability is the function bz3_decode_block in the library libbzip3.a. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2023-29419. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in bzip3 up to 1.2.2. It has been declared as problematic. Affected by this vulnerability is the function bz3_decode_block in the library libbzip3.a. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is:

An issue was discovered in libbzip3.a in bzip3 before 1.2.3. There is a bz3_decode_block out-of-bounds read.

The weakness was published 04/06/2023 as 92. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-29419 since 04/06/2023. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 1.2.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 8ec8ce7d3d58bf42dabc47e4cc53aa27051bd602 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-32988). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

bzip3

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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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: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / 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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: bzip3 1.2.3
Patch: 8ec8ce7d3d58bf42dabc47e4cc53aa27051bd602

Timelineinfo

04/06/2023 🔍
04/06/2023 +0 days 🔍
04/06/2023 +0 days 🔍
12/09/2025 +978 days 🔍

Sourcesinfo

Advisory: 92
Status: Confirmed

CVE: CVE-2023-29419 (🔍)
GCVE (CVE): GCVE-0-2023-29419
GCVE (VulDB): GCVE-100-225115
EUVD: 🔍

Entryinfo

Created: 04/06/2023 13:56
Updated: 12/09/2025 18:05
Changes: 04/06/2023 13:56 (44), 04/23/2023 13:23 (11), 12/09/2025 18:05 (16)
Complete: 🔍
Cache ID: 216::103

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