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.

Published: 2013-08-19 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-2175 is rated Moderate Risk (54.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.49%). EPSS rose +3.41% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-2175

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.08% 3.49% +3.41%
2 2025-03-17 2.53% 0.08% -2.45%
3 2024-12-17 — 2.53% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-2175

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2013-2175

OS Trackers for CVE-2013-2175

vendor priority summary link
debian not yet assigned CVE-2013-2175 not yet assigned priority: Debian including 1 source packages (haproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-2175
gentoo high CVE-2013-2175: 1 GLSA(s) (201307-01), 1 atom(s) (net-proxy/haproxy); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-2175
redhat medium — https://access.redhat.com/security/cve/CVE-2013-2175
ubuntu medium CVE-2013-2175 medium priority: Ubuntu including 1 source packages (haproxy), 5 status rows across 5 suites (lucid, precise, quantal, raring, upstream): released 4, ignored 1. https://ubuntu.com/security/CVE-2013-2175

Affected software / configurations for CVE-2013-2175

Vendor Product Version Raw CPE
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
canonical ubuntu_linux 12.10 cpe:2.3:o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
canonical ubuntu_linux 13.04 cpe:2.3:o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
redhat enterprise_linux_load_balancer 6.0 cpe:2.3:a:redhat:enterprise_linux_load_balancer:6.0:*:*:*:*:*:*:*
redhat enterprise_linux_load_balancer 6.4 cpe:2.3:a:redhat:enterprise_linux_load_balancer:6.4:*:*:*:*:*:*:*
haproxy haproxy 1.4 cpe:2.3:a:haproxy:haproxy:1.4:*:*:*:*:*:*:*
haproxy haproxy 1.4.0 cpe:2.3:a:haproxy:haproxy:1.4.0:*:*:*:*:*:*:*
haproxy haproxy 1.4.1 cpe:2.3:a:haproxy:haproxy:1.4.1:*:*:*:*:*:*:*
haproxy haproxy 1.4.2 cpe:2.3:a:haproxy:haproxy:1.4.2:*:*:*:*:*:*:*
haproxy haproxy 1.4.3 cpe:2.3:a:haproxy:haproxy:1.4.3:*:*:*:*:*:*:*
haproxy haproxy 1.4.4 cpe:2.3:a:haproxy:haproxy:1.4.4:*:*:*:*:*:*:*
haproxy haproxy 1.4.5 cpe:2.3:a:haproxy:haproxy:1.4.5:*:*:*:*:*:*:*
haproxy haproxy 1.4.6 cpe:2.3:a:haproxy:haproxy:1.4.6:*:*:*:*:*:*:*
haproxy haproxy 1.4.7 cpe:2.3:a:haproxy:haproxy:1.4.7:*:*:*:*:*:*:*
haproxy haproxy 1.4.8 cpe:2.3:a:haproxy:haproxy:1.4.8:*:*:*:*:*:*:*
haproxy haproxy 1.4.9 cpe:2.3:a:haproxy:haproxy:1.4.9:*:*:*:*:*:*:*
haproxy haproxy 1.4.10 cpe:2.3:a:haproxy:haproxy:1.4.10:*:*:*:*:*:*:*
haproxy haproxy 1.4.11 cpe:2.3:a:haproxy:haproxy:1.4.11:*:*:*:*:*:*:*
haproxy haproxy 1.4.12 cpe:2.3:a:haproxy:haproxy:1.4.12:*:*:*:*:*:*:*
haproxy haproxy 1.4.13 cpe:2.3:a:haproxy:haproxy:1.4.13:*:*:*:*:*:*:*
haproxy haproxy 1.4.14 cpe:2.3:a:haproxy:haproxy:1.4.14:*:*:*:*:*:*:*
haproxy haproxy 1.4.15 cpe:2.3:a:haproxy:haproxy:1.4.15:*:*:*:*:*:*:*
haproxy haproxy 1.4.16 cpe:2.3:a:haproxy:haproxy:1.4.16:*:*:*:*:*:*:*
haproxy haproxy 1.4.17 cpe:2.3:a:haproxy:haproxy:1.4.17:*:*:*:*:*:*:*
haproxy haproxy 1.4.18 cpe:2.3:a:haproxy:haproxy:1.4.18:*:*:*:*:*:*:*
haproxy haproxy 1.4.19 cpe:2.3:a:haproxy:haproxy:1.4.19:*:*:*:*:*:*:*
haproxy haproxy 1.4.20 cpe:2.3:a:haproxy:haproxy:1.4.20:*:*:*:*:*:*:*
haproxy haproxy 1.4.21 cpe:2.3:a:haproxy:haproxy:1.4.21:*:*:*:*:*:*:*
haproxy haproxy 1.4.22 cpe:2.3:a:haproxy:haproxy:1.4.22:*:*:*:*:*:*:*
haproxy haproxy 1.4.23 cpe:2.3:a:haproxy:haproxy:1.4.23:*:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev0:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev1:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev10:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev11:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev12:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev13:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev14:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev15:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev16:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev18:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev2:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev3:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev4:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev5:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev6:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev7:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev8:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev9:*:*:*:*:*:*

References for CVE-2013-2175

cvelogic Threat Intelligence