CVE-2013-4115

7.5 HIGH 44% exploit odds Fix listed Memory safety Server

What it is

Buffer overflow in the idnsALookup function in dns_internal.cc in Squid 3.2 through 3.2.11 and 3.3 through 3.3.6 allows remote attackers to cause a denial of service (memory corruption and server termination) via a long name in a DNS lookup request.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 43.9% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2013-08-09 22:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:56 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 43.9% in the next 30 days (EPSS).
Severity: 7.5 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2013-08-09 22:55 UTC
Last modified: 2026-06-16 23:56 UTC
Exploit probability: 43.9% · EPSS, next 30 days
Weakness: CWE-119 · Buffer errors
Record status: Modified

Affected

Opensuse 11.4
Opensuse 12.2
Opensuse 12.3
squid-cache Squid 3.2.0.2
squid-cache Squid 3.2.0.3
squid-cache Squid 3.2.0.4
squid-cache Squid 3.2.0.5
squid-cache Squid 3.2.0.6

Attack profile CVSS 2.0 · 7.5

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: Partial
Integrity: Partial
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2013-4115.md and follow it. Check whether this project is affected by CVE-2013-4115. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record