USN-6076-1: Synapse vulnerabilities
16 May 2023
Several security issues were fixed in Synapse.
Releases
Packages
- matrix-synapse - Synapse: Matrix homeserver written in Python/Twisted.
Details
It was discovered that Synapse incorrectly handled certain inputs. If a
user or an automated system were tricked into opening a specially crafted
input file, a remote attacker could possibly use this issue to cause a
denial of service. (CVE-2019-18835, CVE-2018-12291, CVE-2018-10657)
It was discovered that Synapse incorrectly handled certain inputs. If a
user or an automated system were tricked into opening a specially crafted
input file, a remote attacker could possibly use this issue to hijack the
session. (CVE-2019-11842, CVE-2018-12423)
It was discovered that Synapse incorrectly handled certain inputs. If a
user or an automated system were tricked into opening a specially crafted
input file, a remote attacker could possibly use this issue to perform
spoofing or user impersonation. (CVE-2019-5885, CVE-2018-16515)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04
-
matrix-synapse
-
0.24.0+dfsg-1ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.