CVE-2025-14523 Libsoup: libsoup: duplicate host header handling causes host-parsing discrepancy (first- vs last-value wins)
A flaw in libsoup’s HTTP header handling allows multiple Host: headers in a request and returns the last occurrence for server-side processing. Common front proxies often honor the first Host: header, so this mismatch can cause vhost confusion where a proxy routes a request to one backend but the backend interprets it as destined for another host. This discrepancy enables request-smuggling style attacks, cache poisoning, or bypassing host-based access controls when an attacker supplies duplicate Host headers.
Problem types: cwe_id: CWE-444
description: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected products: vendor: Red Hat
product: Red Hat Enterprise Linux 10
cpes: cpe:/o:redhat:enterprise_linux:10.1
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 10.0 Extended Update Support
cpes: cpe:/o:redhat:enterprise_linux_eus:10.0
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 7 Extended Lifecycle Support
cpes: cpe:/o:redhat:rhel_els:7
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/o:redhat:enterprise_linux:8::baseos
cpe:/a:redhat:enterprise_linux:8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/a:redhat:enterprise_linux:8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8
cpes: cpe:/o:redhat:enterprise_linux:8::baseos
cpe:/a:redhat:enterprise_linux:8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Advanced Update Support
cpes: cpe:/a:redhat:rhel_aus:8.2::appstream
cpe:/o:redhat:rhel_aus:8.2::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.2 Advanced Update Support
cpes: cpe:/a:redhat:rhel_aus:8.2::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
cpes: cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/o:redhat:rhel_aus:8.4::baseos
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
cpes: cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
cpes: cpe:/o:redhat:rhel_eus_long_life:8.4::baseos
cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/o:redhat:rhel_aus:8.4::baseos
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
cpes: cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/o:redhat:rhel_e4s:8.6::baseos
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/o:redhat:rhel_aus:8.6::baseos
cpe:/o:redhat:rhel_tus:8.6::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Telecommunications Update Service
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/o:redhat:rhel_e4s:8.6::baseos
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/o:redhat:rhel_aus:8.6::baseos
cpe:/o:redhat:rhel_tus:8.6::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Telecommunications Update Service
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/o:redhat:rhel_e4s:8.6::baseos
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
cpe:/o:redhat:rhel_aus:8.6::baseos
cpe:/o:redhat:rhel_tus:8.6::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_tus:8.6::appstream
cpe:/a:redhat:rhel_e4s:8.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Telecommunications Update Service
cpes: cpe:/o:redhat:rhel_e4s:8.8::baseos
cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
cpe:/o:redhat:rhel_tus:8.8::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Telecommunications Update Service
cpes: cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
cpes: cpe:/o:redhat:rhel_e4s:8.8::baseos
cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
cpe:/o:redhat:rhel_tus:8.8::baseos
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9
cpes: cpe:/a:redhat:enterprise_linux:9::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:9.0::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
cpes: cpe:/a:redhat:rhel_e4s:9.2::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.4 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.4::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 9.6 Extended Update Support
cpes: cpe:/a:redhat:rhel_eus:9.6::appstream
default_status: affected
vendor: Red Hat
product: Red Hat Enterprise Linux 6
cpes: cpe:/o:redhat:enterprise_linux:6
default_status: unknown
CVSS v3.1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 8.2
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N
version: 3.1
Credits: lang: en
value: Red Hat would like to thank Ky0toFu and Sovereign Tech Resilience program for reporting this issue.
Published: 2025-12-11T12:30:59.266Z