CVE-2021-21238
CVSS V2 Medium 4.3
CVSS V3 Medium 6.5
Description
PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. All users of pysaml2 that need to validate signed SAML documents are impacted. The vulnerability is a variant of XML Signature wrapping because it did not validate the SAML document against an XML schema. This allowed invalid XML documents to be processed and such a document can trick pysaml2 with a wrapped signature. This is fixed in PySAML2 6.5.0.
Overview
- CVE ID
- CVE-2021-21238
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-01-21T15:15:14
- Last Modified Date
- 2021-01-29T17:58:02
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:pysaml2_project:pysaml2:*:*:*:*:*:*:*:* | 1 | OR | 6.5.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:N/C:N/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 4.3
- Severity
- MEDIUM
- Exploitability Score
- 8.6
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://pypi.org/project/pysaml2 | Product Third Party Advisory |
| https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 | Third Party Advisory |
| https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14 | Patch Third Party Advisory |
| https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9 | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-21238 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21238 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:25:29 | Added to TrackCVE | |||
| 2022-12-05 20:45:07 | 2021-01-21T15:15Z | 2021-01-21T15:15:14 | CVE Published Date | updated |
| 2022-12-05 20:45:07 | 2021-01-29T17:58:02 | CVE Modified Date | updated | |
| 2022-12-05 20:45:07 | Analyzed | Vulnerability Status | updated |