libarchive up to 3.4.1 RAR5 File archive_read_support_format_rar5.c input validation

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.
7.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in libarchive up to 3.4.1. It has been classified as critical. This impacts an unknown function of the file archive_read_support_format_rar5.c of the component RAR5 File Handler. This manipulation causes input validation. The identification of this vulnerability is CVE-2020-9308. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in libarchive up to 3.4.1 (File Compression Software). It has been declared as critical. Affected by this vulnerability is an unknown code block of the file archive_read_support_format_rar5.c of the component RAR5 File Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

archive_read_support_format_rar5.c in libarchive before 3.4.2 attempts to unpack a RAR5 file with an invalid or corrupted header (such as a header size of zero), leading to a SIGSEGV or possibly unspecified other impact.

The weakness was shared 02/20/2020. This vulnerability is known as CVE-2020-9308. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 3.4.2 eliminates this vulnerability.

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

Productinfo

Type

File Compression Software

Name

libarchive

Version

License

open-source

Website

Product: https://github.com/libarchive/libarchive/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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: libarchive 3.4.2
Patch: github.com

Timelineinfo

02/20/2020 🔍
02/20/2020 +0 days 🔍
02/20/2020 +0 days 🔍
05/11/2025 +1907 days 🔍

Sourcesinfo

Product: github.com

Advisory: USN-4293-1
Status: Confirmed

CVE: CVE-2020-9308 (🔍)
GCVE (CVE): GCVE-0-2020-9308
GCVE (VulDB): GCVE-100-150379

Entryinfo

Created: 02/20/2020 17:40
Updated: 05/11/2025 10:06
Changes: 02/20/2020 17:40 (37), 02/20/2020 17:45 (17), 04/02/2024 07:00 (21), 04/02/2024 07:14 (1), 05/11/2025 10:06 (6)
Complete: 🔍
Cache ID: 216::103