Pygments up to 2.7.3 SMLLexer exception infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Pygments up to 2.7.3. Affected is an unknown function of the component SMLLexer. Executing a manipulation of the argument exception can lead to infinite loop. This vulnerability is registered as CVE-2021-20270. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Pygments up to 2.7.3. It has been declared as problematic. This vulnerability affects an unknown code block of the component SMLLexer. The manipulation of the argument exception with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability.

The weakness was published 03/24/2021. The advisory is available at bugzilla.redhat.com. This vulnerability was named CVE-2021-20270. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 215735 (Azure Linux 3.0 Security Update: python-pygments (CVE-2021-20270)), 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 (215735). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.9

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
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: 215735
Nessus Name: Azure Linux 3.0 Security Update: python-pygments (CVE-2021-20270)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/17/2020 🔍
03/24/2021 +97 days 🔍
03/24/2021 +0 days 🔍
02/12/2025 +1421 days 🔍

Sourcesinfo

Advisory: bugzilla.redhat.com
Status: Not defined

CVE: CVE-2021-20270 (🔍)
GCVE (CVE): GCVE-0-2021-20270
GCVE (VulDB): GCVE-100-171610

Entryinfo

Created: 03/24/2021 08:01
Updated: 02/12/2025 02:39
Changes: 03/24/2021 08:01 (36), 04/04/2021 08:08 (2), 04/04/2021 08:10 (18), 02/12/2025 02:39 (16)
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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