CVE-2014-3609 Denial of service in n/a
Remote attackers can crash the Squid proxy server by sending requests with crafted Range headers, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2014-3609?
CVE-2014-3609 is a medium-severity denial of service vulnerability in Squid-Cache Squid, published on 11 Sep 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
HttpHdrRange.cc in Squid 3.x before 3.3.12 and 3.4.x before 3.4.6 allows remote attackers to cause a denial of service (crash) via a request with crafted "Range headers with unidentifiable byte-range values."
Weakness: CWE-20
Which versions are affected by CVE-2014-3609?
It affects 1 product.
Linux distribution packages (6)
squid Red Hat:enterprise_linux:7::server | All versions | 7:3.3.8-12.el7_0 |
squid-debuginfo Red Hat:enterprise_linux:7::server | All versions | 7:3.3.8-12.el7_0 |
squid-sysvinit Red Hat:enterprise_linux:7::server | All versions | 7:3.3.8-12.el7_0 |
squid Red Hat:enterprise_linux:7::workstation | All versions | 7:3.3.8-12.el7_0 |
squid-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 7:3.3.8-12.el7_0 |
squid-sysvinit Red Hat:enterprise_linux:7::workstation | All versions | 7:3.3.8-12.el7_0 |
Products include Squid-Cache Squid.
How do I fix CVE-2014-3609?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2014-3609 being exploited?
There is no known exploitation of CVE-2014-3609 in the wild and no public exploit code.
Other vulnerabilities in Squid-Cache Squid
- CVE-2025-62168 Squid vulnerable to information disclosure via authentication credential leakage in error handling
- CVE-2025-54574 Squid's URN Handling can lead to Buffer Overflow
- CVE-2026-33526 Squid vulnerable to Denial of Service in ICP Request handling
- CVE-2026-32748 Squid has Denial of Service in ICP Response handling
- CVE-2023-50269 SQUID-2023:10 Denial of Service in HTTP Request parsing
Sources
Also known as DEBIAN-CVE-2014-3609, DLA-216-1, DLA-45-1, DSA-3014-1, DSA-3139-1, GHSA-wfpr-78ph-w6wr and 4 more.