QID 983246

QID 983246: Python (pip) Security Update for matrix-synapse (GHSA-4mp3-385r-v63f)

Security update has been released for matrix-synapse to fix the vulnerability.

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

A denial of service attack against Matrix clients can be exploited by sending an event including invalid JSON data to Synapse. Synapse would relay the data to clients which could crash or hang. Impact is long-lasting if the event is made part of the room state.

CVSS V3 rated as High - 7.5 severity.

CVSS V2 rated as Medium - 5 severity.

Solution

At a minimum #8106 and #8291 must be applied. #7372 and #8124 include additional checks.Workaround:
There are no known workarounds.

Vendor References

GHSA-4mp3-385r-v63f - github.com/advisories/GHSA-4mp3-385r-v63f

CVEs related to QID 983246

CVE-2020-26890 |

Software Advisories

Advisory ID	Software	Component	Link
GHSA-4mp3-385r-v63f	matrix-synapse		github.com/advisories/GHSA-4mp3-385r-v63f

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