CVE-2021-29431
Sydent HTTP Request Smuggling/Internal Port Enumeration Vulnerability
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.
INFO
Published Date :
April 15, 2021, 9:15 p.m.
Last Modified :
April 22, 2021, 3:27 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.0
Exploitability Score :
3.1
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-29431
.
URL | Resource |
---|---|
https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a | Patch Third Party Advisory |
https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3 | Patch Third Party Advisory |
https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a | Patch Third Party Advisory |
https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f | Patch Third Party Advisory |
https://github.com/matrix-org/sydent/releases/tag/v2.3.0 | Release Notes Third Party Advisory |
https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4 | Patch Third Party Advisory |
https://pypi.org/project/matrix-sydent/ | Product Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-29431
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-29431
vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Apr. 22, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:P/I:N/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Changed Reference Type https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a No Types Assigned https://github.com/matrix-org/sydent/commit/0f00412017f25619bc36c264b29ea96808bf310a Patch, Third Party Advisory Changed Reference Type https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3 No Types Assigned https://github.com/matrix-org/sydent/commit/3d531ed50d2fd41ac387f36d44d3fb2c62dd22d3 Patch, Third Party Advisory Changed Reference Type https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a No Types Assigned https://github.com/matrix-org/sydent/commit/8936925f561b0c352c2fa922d5097d7245aad00a Patch, Third Party Advisory Changed Reference Type https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f No Types Assigned https://github.com/matrix-org/sydent/commit/9e573348d81df8191bbe8c266c01999c9d57cd5f Patch, Third Party Advisory Changed Reference Type https://github.com/matrix-org/sydent/releases/tag/v2.3.0 No Types Assigned https://github.com/matrix-org/sydent/releases/tag/v2.3.0 Release Notes, Third Party Advisory Changed Reference Type https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4 No Types Assigned https://github.com/matrix-org/sydent/security/advisories/GHSA-9jhm-8m8c-c3f4 Patch, Third Party Advisory Changed Reference Type https://pypi.org/project/matrix-sydent/ No Types Assigned https://pypi.org/project/matrix-sydent/ Product, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:matrix:sydent:*:*:*:*:*:*:*:* versions up to (excluding) 2.3.0
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-29431
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-29431
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.10 }} 0.00%
score
0.40508
percentile