Resource exhaustion in Matrix Sydent
CVE-2021-29430
Sydent is a reference Matrix identity server. Sydent does not limit the size of requests it receives from HTTP clients. A malicious user could send an HTTP request with a very large body, leading to memory exhaustion and denial of service…
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.018 (76.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Matrix Sydent
- Matrix-org Sydent — versions < 2.3.0
Weakness classification (CWE)
References
- security-advisories@github.com (Product, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2021-29430?
- CVE-2021-29430 is a high-severity vulnerability in Matrix Sydent, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-04-15.
- How severe is CVE-2021-29430?
- High severity. CVSS v3 base score is 7.5 out of 10.