Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2023-50269 |
CWE-ID | CWE-674 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
Squid Server applications / IDS/IPS systems, Firewalls and proxy servers |
Vendor | Squid-cache.org |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU84442
Risk: Medium
CVSSv4.0: 6.6 [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/E:U/U:Green]
CVE-ID: CVE-2023-50269
CWE-ID:
CWE-674 - Uncontrolled Recursion
Exploit availability: No
DescriptionThe vulnerability allows a remote client to perform a denial of service (DoS) attack.
The vulnerability exists due to uncontrolled recursion when parsing HTTP requests. A remote client can send a specially crafted HTTP request with the a large X-Forwarded-For header, when the follow_x_forwarded_for feature is configured, and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsSquid: 2.6.stable1 - 6.5
CPE2.3https://github.com/squid-cache/squid/security/advisories/GHSA-wgq4-4cfg-c4x3
https://www.squid-cache.org/Versions/v5/SQUID-2023_10.patch
https://www.squid-cache.org/Versions/v6/SQUID-2023_10.patch
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.