[Pkg-matrix-maintainers] Bug#944355: matrix-synapse: CVE-2019-18835

[Salvatore Bonaccorso]

Source: matrix-synapse
Version: 1.4.0-1
Severity: important
Tags: security upstream
Forwarded: https://github.com/matrix-org/synapse/pull/6262

Hi,

The following vulnerability was published for matrix-synapse.

CVE-2019-18835[0]:
| Matrix Synapse before 1.5.0 mishandles signature checking on some
| federation APIs. Events sent over /send_join, /send_leave, and /invite
| may not be correctly signed, or may not come from the expected
| servers.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2019-18835
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18835
[1] https://github.com/matrix-org/synapse/pull/6262

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore