Perl up to 5.30.2 Regular Expression regcomp.c S_study_chunk buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Perl up to 5.30.2. This issue affects the function S_study_chunk of the file regcomp.c of the component Regular Expression. Executing a manipulation can lead to buffer overflow. This vulnerability is handled as CVE-2020-12723. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Perl up to 5.30.2 (Programming Language Software) and classified as critical. This vulnerability affects the function S_study_chunk of the file regcomp.c of the component Regular Expression. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.

The weakness was released 06/05/2020 (GitHub Repository). The advisory is available at github.com. This vulnerability was named CVE-2020-12723 since 05/08/2020. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

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). Entries connected to this vulnerability are available at VDB-156220 and VDB-156221. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / 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

05/08/2020 🔍
06/05/2020 +28 days 🔍
06/06/2020 +1 days 🔍
05/19/2025 +1807 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2020-12723 (🔍)
GCVE (CVE): GCVE-0-2020-12723
GCVE (VulDB): GCVE-100-156226
See also: 🔍

Entryinfo

Created: 06/06/2020 09:06
Updated: 05/19/2025 00:07
Changes: 06/06/2020 09:06 (41), 06/06/2020 09:11 (18), 10/22/2020 16:26 (1), 05/19/2025 00:07 (21)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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