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CVE-2021-29433: Sydent DoS (via resource exhaustion) due to improper input validation

April 16, 2021 (updated September 24, 2024)

Missing 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.

References

  • github.com/advisories/GHSA-pw4v-gr34-2553
  • github.com/matrix-org/sydent
  • github.com/matrix-org/sydent/commit/3175fd358ebc2c310eab7a3dbf296ce2bd54c1da
  • github.com/matrix-org/sydent/security/advisories/GHSA-pw4v-gr34-2553
  • github.com/pypa/advisory-database/tree/main/vulns/matrix-sydent/PYSEC-2021-24.yaml
  • nvd.nist.gov/vuln/detail/CVE-2021-29433
  • pypi.org/project/matrix-sydent

Code Behaviors & Features

Detect and mitigate CVE-2021-29433 with GitLab Dependency Scanning

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Affected versions

All versions before 2.3.0

Fixed versions

  • 2.3.0

Solution

Upgrade to version 2.3.0 or above.

Impact 4.3 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Learn more about CVSS

Weakness

  • CWE-20: Improper Input Validation
  • CWE-400: Uncontrolled Resource Consumption

Source file

pypi/matrix-sydent/CVE-2021-29433.yml

Spotted a mistake? Edit the file on GitLab.

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