Vulnerability · Published Apr 15, 2021 · Assigned by GitHub_M
CVE-2021-29433Denial of service (via resource exhaustion) due to improper input validation
Medium 4.3
In plain English
A medium-severity improper input validation in sydent from matrix-org. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 61% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Sydent is a reference Matrix identity server. In Sydent versions 2.2.0 and prior, sissing input validation of some parameters on the endpoints used to confirm third-party identifiers could cause excessive use of disk space and memory leading to resource exhaustion. A patch for the vulnerability is in version 2.3.0. No workarounds are known to exist.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | matrix-sydent | 2.3.0 | GHSA-pw4v-gr34-2553 |
| PyPI | matrix-sydent | 2.3.0 | PYSEC-2021-24 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| matrix-org | sydent | <= 2.2.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L