How severe is CVE-2013-4115?

CVE-2013-4115 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2013-4115 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-4115?

CVE-2013-4115 primarily affects Squid-cache Squid. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-4115?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-4115 published?

CVE-2013-4115 was published on 2013-08-09 and last updated on 2026-06-16.

CVE-2013-4115

CVE-2013-4115 is a high-severity vulnerability in Squid-cache Squid with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-119.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 43% (99th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Squid-cache Squid
Published: 2013-08-09
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2013-4115?: 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.
How severe is CVE-2013-4115?: CVE-2013-4115 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-4115 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-4115?: CVE-2013-4115 primarily affects Squid-cache Squid. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-4115?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-4115 published?: CVE-2013-4115 was published on 2013-08-09 and last updated on 2026-06-16.

References

Affected products (20)

cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:12.2:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.0:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.3:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.4:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.5:*:*:*:*:*:*:*
cpe:2.3:a:squid-cache:squid:3.3.6:*:*:*:*:*:*:*

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