vulnerability
Arch Linux: Denial of service (CVE-2021-28651)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:N/A:P) | May 27, 2021 | Jul 11, 2025 | Mar 25, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
May 27, 2021
Added
Jul 11, 2025
Modified
Mar 25, 2026
Description
Due to a buffer management bug Squid before version 4.15 is vulnerable to a denial of service attack against the server it is operating on. This attack is limited to proxies which attempt to resolve a "urn:" resource identifier. Support for this resolving is enabled by default in all Squid.
Solution
arch-linux-upgrade-latest
References
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.