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haproxy: HTTP request smuggling issue with transfer-encoding header containing an obfuscated "chunked" value

🗓️ 26 May 2020 10:43:03Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 8 Views

HAProxy legacy mode fails to reject non-chunked transfer-encoding, enabling smuggling.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
IBM Security Bulletins		Security Bulletin: Multiple Security Vulnerabilities were identified in IBM Security Verify Access.
9 Jan 202420:27
–ibm
IBM Security Bulletins		Security Bulletin: HAProxy vulnerability CVE-2019-18277 impacts IBM Aspera High-Speed Transfer Server and Aspera High-Speed Transfer Endpoint versions prior to V4.0
10 Dec 202022:14
–ibm
BDU FSTEC		The vulnerability of the server software HAProxy, related to deficiencies in HTTP request processing, allows attackers to compromise data integrity.
14 Nov 202300:00
–bdu_fstec
Tenable Nessus		CentOS 8 : haproxy (CESA-2020:1725)
1 Feb 202100:00
–nessus
Tenable Nessus		Debian DLA-3034-1 : haproxy - LTS security update
31 May 202200:00
–nessus
Tenable Nessus		EulerOS 2.0 SP5 : haproxy (EulerOS-SA-2020-1105)
24 Feb 202000:00
–nessus
Tenable Nessus		EulerOS Virtualization for ARM 64 3.0.2.0 : haproxy (EulerOS-SA-2020-1523)
1 May 202000:00
–nessus
Tenable Nessus		EulerOS Virtualization 3.0.6.0 : haproxy (EulerOS-SA-2020-1757)
1 Jul 202000:00
–nessus
Tenable Nessus		EulerOS 2.0 SP8 : haproxy (EulerOS-SA-2020-1805)
30 Jul 202000:00
–nessus
Tenable Nessus		EulerOS Virtualization for ARM 64 3.0.6.0 : haproxy (EulerOS-SA-2020-1904)
28 Aug 202000:00
–nessus
Rows per page
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux7x86_64rh-haproxy18-haproxy0:1.8.24-2.el7rh-haproxy18-haproxy-0:1.8.24-2.el7.x86_64.rpm
Red Hat Enterprise Linux7x86_64rh-haproxy18-haproxy-debuginfo0:1.8.24-2.el7rh-haproxy18-haproxy-debuginfo-0:1.8.24-2.el7.x86_64.rpm
Red Hat Enterprise Linux7x86_64rh-haproxy18-haproxy-syspaths0:1.8.24-2.el7rh-haproxy18-haproxy-syspaths-0:1.8.24-2.el7.x86_64.rpm

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28 Jun 2026 12:33Current
7.2High risk
Vulners AI Score7.2
CVSS 24.3
CVSS 3.17.5
EPSS0.10024
CWE-444
transfer encodingmissing chunkedlegacy moderequest smugglinghttp reusehaproxy vulnerability
8