CVE-2014-3609
MediumHttpHdrRange.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."
Published Sep 11, 2014 · Updated Aug 11, 2026 · Also known as DEBIAN-CVE-2014-3609, DLA-216-1, DLA-45-1, DSA-3014-1, DSA-3139-1, UBUNTU-CVE-2014-3609, USN-2327-1
Key Facts
Patch immediately- CVE-2014-3609 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Squid (Squid-Cache), squid3 (debian), squid-sysvinit (oracle).
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 56% probability of exploitation in the next 30 days.
- Fixed versions are available, including Squid 2.7.STABLE9-2.1+deb6u1, Squid 2.7.STABLE9-4.1+deb7u1, Squid 2.7.STABLE9-5.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
5.0
AV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS (30-day exploit likelihood)
56%
Higher than 99.0% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
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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."
Affected Products
109 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SquidSquid-Cache | 3.1, 3.1.0.1, 3.1.0.10, 3.1.0.11, 3.1.0.12, 3.1.0.13, 3.1.0.14, 3.1.0.15 | 2.7.STABLE9-5 |
| squid3debian | See advisory | 3.1.6-1.2+squeeze4 |
| squid-sysvinitoracle | See advisory | 7:3.3.8-12.el7_0 |
Patched Releases
Squid
2.7.STABLE9-2.1+deb6u1, 2.7.STABLE9-4.1+deb7u1, 2.7.STABLE9-5, 7:2.6.STABLE21-7.el5_10, 7:3.1.10-22.16.amzn1, 7:3.1.10-22.el6_5, 7:3.1.10-29.17.amzn1, 7:3.3.8-12.el7_0
squid-sysvinit
7:3.3.8-12.el7_0
squid3
3.1.20-2.2+deb7u2, 3.1.6-1.2+squeeze4, 3.3.8-1ubuntu6.1
Timeline
Publicly disclosed
Sep 11, 2014
Last updated
Aug 11, 2026
Weakness Type
- CWE-20 Improper Input Validation
- CWE-228 Improper Handling of Syntactically Invalid Structure
- CWE-617 Reachable Assertion
References
- advisoryRHSA-2014:1147
- advisoryRHSA-2014:1148
- advisoryhttps://security-tracker.debian.org/tracker/CVE-2014-3609
- advisoryhttps://ubuntu.com/security/CVE-2014-3609
- advisoryhttps://ubuntu.com/security/notices/USN-2327-1
FAQ
Common Questions.
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."
Affected: Squid (Squid-Cache) versions 3.1, 3.1.0.1, 3.1.0.10, 3.1.0.11, 3.1.0.12, 3.1.0.13, 3.1.0.14, 3.1.0.15; squid3 (debian); squid-sysvinit (oracle). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including Squid 2.7.STABLE9-2.1+deb6u1, Squid 2.7.STABLE9-4.1+deb7u1, Squid 2.7.STABLE9-5.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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