CVE-2021-20270
CVSS V2 Medium 5
CVSS V3 High 7.5
Description
An infinite loop in SMLLexer in Pygments versions 1.5 to 2.7.3 may lead to denial of service when performing syntax highlighting of a Standard ML (SML) source file, as demonstrated by input that only contains the "exception" keyword.
Overview
- CVE ID
- CVE-2021-20270
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-03-23T17:15:13
- Last Modified Date
- 2021-12-10T17:04:10
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:pygments:pygments:*:*:*:*:*:*:*:* | 1 | OR | 1.5 | 2.7.3 |
| cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:openstack_platform:10.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:a:redhat:software_collections:-:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 5
- Severity
- MEDIUM
- Exploitability Score
- 10
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 7.5
- Base Severity
- HIGH
- Exploitability Score
- 3.9
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1922136 | Issue Tracking Patch Third Party Advisory |
| https://www.debian.org/security/2021/dsa-4889 | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html | Mailing List Third Party Advisory |
| https://www.oracle.com/security-alerts/cpuoct2021.html | Not Applicable Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20270 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20270 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:41:49 | Added to TrackCVE | |||
| 2022-12-06 00:15:03 | 2021-03-23T17:15Z | 2021-03-23T17:15:13 | CVE Published Date | updated |
| 2022-12-06 00:15:03 | 2021-12-10T17:04:10 | CVE Modified Date | updated | |
| 2022-12-06 00:15:03 | Analyzed | Vulnerability Status | updated |