← Vulnerability feed

Vulnerability record · CVE-2018-20103 · published 12 December 2018

CVE-2018-20103: Haproxy vulnerability

Haproxy · Haproxy

An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.

7.5 CVSS 3.0 High EPSS 6.6% · top 6.4% CWE-835 · CWE-835
7.5CVSS 3.0 base score, v2 5.0
6.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in dns.c in HAProxy through 1.8.14. In the case of a compressed pointer, a crafted packet can trigger infinite recursion by making the pointer point to itself, or create a long chain of valid pointers resulting in stack exhaustion.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=58df5aea0a0c926b2238f65908f5e9f83d1cca25
http://www.securityfocus.com/bid/106280 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHBA-2019:0326 Third Party Advisory
https://access.redhat.com/errata/RHBA-2019:0327 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1436
https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
https://usn.ubuntu.com/3858-1/ Third Party Advisory
http://git.haproxy.org/?p=haproxy.git%3Ba=commit%3Bh=58df5aea0a0c926b2238f65908f5e9f83d1cca25
http://www.securityfocus.com/bid/106280 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHBA-2019:0326 Third Party Advisory
https://access.redhat.com/errata/RHBA-2019:0327 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1436
https://lists.debian.org/debian-lts-announce/2022/05/msg00045.html
https://usn.ubuntu.com/3858-1/ Third Party Advisory

Track CVE-2018-20103 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2019-7609Kibana Timelion visualizer code injection enables remote code executionKibana before 5.6.15 and 6.6.1 contains an arbitrary code execution flaw in the Timelion visualizer. An attacker who can reach the Timelion applicati…KEVEPSS 95%analysed9.9CVE-2019-1003029Jenkins Script Security Plugin sandbox bypass allows code executionThe Jenkins Script Security Plugin 1.53 and earlier fails to properly enforce its Groovy sandbox in GroovySandbox.java and SecureGroovyScript.java, l…KEVEPSS 74%analysed9.9CVE-2019-1003030Jenkins Pipeline Groovy Plugin sandbox bypass allows arbitrary code executionThe Jenkins Pipeline: Groovy Plugin (2.63 and earlier) contains a sandbox bypass in CpsGroovyShell.java. Attackers who can control pipeline scripts c…KEVEPSS 97%analysed9.8CVE-2020-11651SaltStack Salt master authentication bypass in ClearFuncsSaltStack Salt before 2019.2.4 and 3000 before 3000.2 fails to properly validate method calls in the salt-master ClearFuncs class, allowing remote un…KEVEPSS 97%analysed9.8CVE-2020-7247OpenSMTPD MAIL FROM command injection allows remote root code executionOpenSMTPD 6.6, as shipped in OpenBSD 6.6 and other products, mishandles input validation in smtp_mailaddr in smtp_session.c, returning an incorrect v…KEVEPSS 99%analysed9.8CVE-2019-11043PHP-FPM buffer overflow enables remote code executionPHP-FPM in certain configurations writes past allocated buffers into FCGI protocol data space, an out-of-bounds write (CWE-787, CWE-120). It affects …KEVEPSS 100%analysed9.8CVE-2019-16928Exim heap buffer overflow in string_vformat via long EHLO commandExim 4.92 through 4.92.2 contains a heap-based buffer overflow in string_vformat in string.c triggered by a long EHLO command, allowing remote code e…KEVEPSS 42%analysed9.8CVE-2019-10149Exim MTA improper recipient validation leads to remote command executionExim versions 4.87 through 4.91 fail to properly validate recipient addresses in the deliver_message() function in /src/deliver.c, allowing command i…KEVEPSS 100%analysed

Source: NIST National Vulnerability Database (record CVE-2018-20103), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.