How severe is CVE-2013-2175?

CVE-2013-2175 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2013-2175 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2175?

CVE-2013-2175 primarily affects Redhat Enterprise Linux Load Balancer. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2175?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-2175 published?

CVE-2013-2175 was published on 2013-08-19 and last updated on 2026-06-16.

CVE-2013-2175

CVE-2013-2175 is a medium-severity vulnerability in Redhat Enterprise Linux Load Balancer with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 4% (88th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Redhat Enterprise Linux Load Balancer
Published: 2013-08-19
Last modified: 2026-06-16

Description

HAProxy 1.4 before 1.4.24 and 1.5 before 1.5-dev19, when configured to use hdr_ip or other "hdr_*" functions with a negative occurrence count, allows remote attackers to cause a denial of service (negative array index usage and crash) via an HTTP header with a certain number of values, related to the MAX_HDR_HISTORY variable.

Frequently asked questions

What is CVE-2013-2175?: HAProxy 1.4 before 1.4.24 and 1.5 before 1.5-dev19, when configured to use hdr_ip or other "hdr_*" functions with a negative occurrence count, allows remote attackers to cause a denial of service (negative array index usage and crash) via an HTTP header with a certain number of values, related to the MAX_HDR_HISTORY variable.
How severe is CVE-2013-2175?: CVE-2013-2175 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2013-2175 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (88th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-2175?: CVE-2013-2175 primarily affects Redhat Enterprise Linux Load Balancer. In total, 51 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-2175?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-2175 published?: CVE-2013-2175 was published on 2013-08-19 and last updated on 2026-06-16.

References

Affected products (51)

cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
cpe:2.3:a:redhat:enterprise_linux_load_balancer:6.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:enterprise_linux_load_balancer:6.4:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.2:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.3:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.4:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.5:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.6:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.7:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.8:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.9:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.10:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.11:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.12:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.13:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.14:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.15:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.16:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.17:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.18:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.19:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.20:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.21:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.22:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.23:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:*

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