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GHSA-7h5v-85w9-pq6c

Fix: matrix-org/synapse#9855

GHSA-7h5v-85w9-pq6c is a security vulnerability in matrix-synapse. O3 Security confirms whether GHSA-7h5v-85w9-pq6c is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Denial of service (via resource exhaustion) due to improper input validation in third-party identifier endpoint

Published
May 19, 2021
Updated
Dec 2, 2024
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Dec 2, 2024 · OSV.dev, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected
🐍matrix-synapse

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

Impact

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.

Patches

The issue is fixed by https://github.com/matrix-org/synapse/pull/9855.

Workarounds

There are no known workarounds.

References

n/a

For more information

If you have any questions or comments about this advisory, email us at [email protected].

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐍PyPImatrix-synapseall versions1.33.0

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for matrix-synapse. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update matrix-synapse to 1.33.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-7h5v-85w9-pq6c is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-7h5v-85w9-pq6c is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-7h5v-85w9-pq6c. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Impact 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. ### Patches The issue is fixed by https://github.com/matrix-org/synapse/pull/9855. ### Workarounds There are no known workarounds. ### References n/a ### For more information If you have any questions or comments about this advisory, email us at [email protected].
O3 Security · Impact-Aware SCA

Is GHSA-7h5v-85w9-pq6c in your dependencies?

O3 detects GHSA-7h5v-85w9-pq6c across PyPI dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-7h5v-85w9-pq6c: matrix-synapse… | O3 Security