Am Wed, Apr 07, 2021 at 09:36:01PM +0200 schrieb Salvatore Bonaccorso:
> Source: syncthing
> Version: 1.12.1~ds1-2
> Severity: important
> Tags: security upstream
> X-Debbugs-Cc: car...@debian.org, Debian Security Team
> <t...@security.debian.org>
>
> Hi,
>
> The following vulnerability was published for syncthing.
>
> CVE-2021-21404[0]:
> | Syncthing is a continuous file synchronization program. In Syncthing
> | before version 1.15.0, the relay server `strelaysrv` can be caused to
> | crash and exit by sending a relay message with a negative length
> | field. Similarly, Syncthing itself can crash for the same reason if
> | given a malformed message from a malicious relay server when
> | attempting to join the relay. Relay joins are essentially random (from
> | a subset of low latency relays) and Syncthing will by default restart
> | when crashing, at which point it's likely to pick another non-
> | malicious relay. This flaw is fixed in version 1.15.0.
>
>
> 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-2021-21404
> https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21404
> [1]
> https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h
> [2]
> https://github.com/syncthing/syncthing/commit/fb4fdaf4c0a79c22cad000c42ac1394e3ccb6a97
>
> Please adjust the affected versions in the BTS as needed.
*ping*, can you please upload a fix and ask for an unblock so that
it gets fixed for bullseye?
Cheers,
Moritz
