Off-by-one in Drachtio Server - CVE-2022-47517
Published: March 8, 2023
Vulnerability identifier: #VU73158
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-47517
CWE-ID: CWE-193
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in url_canonize2() when processing UDP packets. A remote attacker can send a specially crafted UDP request to the server, trigger an off-by-one error and crash it.Affected software
Drachtio Server
How to mitigate CVE-2022-47517
Install update from vendor's website.
Drachtio Server - update to 0.8.19