CVE-2021-29431
CVSS V2 Medium 4
CVSS V3 Medium 6.5
Description
Sydent is a reference Matrix identity server. Sydent can be induced to send HTTP GET requests to internal systems, due to lack of parameter validation or IP address blacklisting. It is not possible to exfiltrate data or control request headers, but it might be possible to use the attack to perform an internal port enumeration. This issue has been addressed in in 9e57334, 8936925, 3d531ed, 0f00412. A potential workaround would be to use a firewall to ensure that Sydent cannot reach internal HTTP resources.
Overview
- CVE ID
- CVE-2021-29431
- Assigner
- security-advisories@github.com
- Vulnerability Status
- Analyzed
- Published Version
- 2021-04-15T21:15:17
- Last Modified Date
- 2021-04-22T15:27:01
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:matrix:sydent:*:*:*:*:*:*:*:* | 1 | OR | 2.3.0 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:L/Au:S/C:P/I:N/A:N
- Access Vector
- NETWORK
- Access Compatibility
- LOW
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- NONE
- Availability Impact
- NONE
- Base Score
- 4
- Severity
- MEDIUM
- Exploitability Score
- 8
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- HIGH
- Availability Impact
- NONE
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3 | Patch Third Party Advisory |
| https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a | Patch Third Party Advisory |
| https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4 | Patch Third Party Advisory |
| https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f | Patch Third Party Advisory |
| https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a | Patch Third Party Advisory |
| https://pypi.org/project/matrix-sydent/ | Product Third Party Advisory |
| https://github.com/matrix-org/sydent/releases/tag/v2.3.0 | Release Notes Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-29431 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29431 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 07:14:47 | Added to TrackCVE | |||
| 2022-12-06 02:02:31 | 2021-04-15T21:15Z | 2021-04-15T21:15:17 | CVE Published Date | updated |
| 2022-12-06 02:02:31 | 2021-04-22T15:27:01 | CVE Modified Date | updated | |
| 2022-12-06 02:02:31 | Analyzed | Vulnerability Status | updated |