Perl up to 5.30.2 on 32-bit Regular Expression out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Perl up to 5.30.2 on 32-bit. This impacts an unknown function of the component Regular Expression. Executing a manipulation can lead to out-of-bounds write. This vulnerability is registered as CVE-2020-10543. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Perl up to 5.30.2 on 32-bit (Programming Language Software). It has been declared as critical. This vulnerability affects an unknown functionality of the component Regular Expression. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow.

The weakness was published 06/05/2020 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2020-10543 since 03/13/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 236646 (Alibaba Cloud Linux 3 : 0012: perl (ALINUX3-SA-2021:0012)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.30.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (236646). Similar entries are available at VDB-156221 and VDB-156226. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 236646
Nessus Name: Alibaba Cloud Linux 3 : 0012: perl (ALINUX3-SA-2021:0012)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Perl 5.30.3

Timelineinfo

03/13/2020 🔍
06/05/2020 +84 days 🔍
06/06/2020 +1 days 🔍
05/18/2025 +1807 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-10543 (🔍)
GCVE (CVE): GCVE-0-2020-10543
GCVE (VulDB): GCVE-100-156220
See also: 🔍

Entryinfo

Created: 06/06/2020 08:58
Updated: 05/18/2025 23:53
Changes: 06/06/2020 08:58 (40), 06/06/2020 09:03 (18), 10/22/2020 15:56 (1), 05/18/2025 23:53 (21)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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