CVE-2025-49812

EUVD-2025-21016
In some mod_ssl configurations on Apache HTTP Server versions through to 2.4.63, an HTTP desynchronisation attack allows a man-in-the-middle attacker to hijack an HTTP session via a TLS upgrade.

Only configurations using "SSLEngine optional" to enable TLS upgrades are affected. Users are recommended to upgrade to version 2.4.64, which removes support for TLS upgrade.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.4 HIGH
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 40%
Affected Products (NVD)
VendorProductVersion
apachehttp_server
𝑥
< 2.4.64
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
apache2
bookworm
2.4.68-1~deb12u1
fixed
bookworm (security)
2.4.67-1~deb12u3
fixed
bullseye
vulnerable
bullseye (security)
2.4.67-1~deb11u3
fixed
forky
2.4.68-1
fixed
sid
2.4.68-1
fixed
trixie
2.4.68-1~deb13u1
fixed
trixie (security)
2.4.67-1~deb13u3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
apache2
bionic
Fixed 2.4.29-1ubuntu4.27+esm6
released
focal
Fixed 2.4.41-4ubuntu3.23+esm2
released
jammy
Fixed 2.4.52-1ubuntu4.15
released
noble
Fixed 2.4.58-1ubuntu8.7
released
plucky
Fixed 2.4.63-1ubuntu1.1
released
questing
Fixed 2.4.64-1ubuntu1
released
resolute
Fixed 2.4.64-1ubuntu1
released
trusty
Fixed 2.4.7-1ubuntu4.22+esm12
released
xenial
Fixed 2.4.18-2ubuntu3.17+esm16
released
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
apache2
suse enterprise desktop 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise desktop 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise sap 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise server 15 SP7
2.4.62-150700.4.3.1
fixed
apache2-devel
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise sap 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise server 15 SP7
2.4.62-150700.4.3.1
fixed
apache2-doc
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.51-150400.6.46.1
fixed
suse enterprise sap 15 SP7
2.4.51-150400.6.46.1
fixed
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.51-150400.6.46.1
fixed
suse enterprise server 15 SP7
2.4.51-150400.6.46.1
fixed
apache2-example-pages
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-prefork
suse enterprise desktop 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise desktop 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise sap 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise server 15 SP7
2.4.62-150700.4.3.1
fixed
apache2-tls13
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-devel
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-doc
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-example-pages
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-prefork
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-utils
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-tls13-worker
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
apache2-utils
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise sap 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise server 15 SP7
2.4.62-150700.4.3.1
fixed
apache2-worker
suse enterprise sap 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise sap 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise sap 15 SP7
2.4.62-150700.4.3.1
fixed
suse enterprise server 12 SP3
2.4.51-29.128.1
fixed
suse enterprise server 12 SP5
2.4.51-35.69.1
fixed
suse enterprise server 15 SP2
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP3
2.4.51-150200.3.82.1
fixed
suse enterprise server 15 SP4
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP5
2.4.66-150400.6.57.1
fixed
suse enterprise server 15 SP6
2.4.58-150600.5.35.1
fixed
suse enterprise server 15 SP7
2.4.62-150700.4.3.1
fixed
Red Hat logo
Red Hat Enterprise Linux Releases
Red Hat Product
Release
httpd
RHEL 9
0:2.4.62-4.el9_6.4
fixed
httpd-core
RHEL 9
0:2.4.62-4.el9_6.4
fixed
httpd-devel
RHEL 9
0:2.4.62-4.el9_6.4
fixed
httpd-filesystem
RHEL 9
0:2.4.62-4.el9_6.4
fixed
httpd-manual
RHEL 9
0:2.4.62-4.el9_6.4
fixed
httpd-tools
RHEL 9
0:2.4.62-4.el9_6.4
fixed
mod
RHEL 9
1:2.4.62-4.el9_6.4
fixed
Amazon Linux logo
Amazon Linux Releases
Amazon Package
Release
httpd
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-core
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-core-debuginfo
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-debuginfo
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-debugsource
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-devel
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-filesystem
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-manual
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-tools
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
httpd-tools-debuginfo
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_ldap
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_ldap-debuginfo
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_lua
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_lua-debuginfo
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_md
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
mod_proxy_html
Amazon Linux 2
1:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
1:2.4.64-1.amzn2023.0.1
fixed
mod_proxy_html-debuginfo
Amazon Linux 2023
1:2.4.64-1.amzn2023.0.1
fixed
mod_session
Amazon Linux 2
0:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_session-debuginfo
Amazon Linux 2023
0:2.4.64-1.amzn2023.0.1
fixed
mod_ssl
Amazon Linux 2
1:2.4.64-1.amzn2.0.1
fixed
Amazon Linux 2023
1:2.4.64-1.amzn2023.0.1
fixed
mod_ssl-debuginfo
Amazon Linux 2023
1:2.4.64-1.amzn2023.0.1
fixed
Azure Linux logo
Azure Linux Releases
Azure Package
Release
httpd
Azure Linux 3.0
0:2.4.64-1.azl3
fixed
CBL-Mariner 2.0
0:2.4.64-1.cm2
fixed
Common Weakness Enumeration
References
https://httpd.apache.org/security/vulnerabilities_24.html
http://www.openwall.com/lists/oss-security/2025/07/09/3
http://www.openwall.com/lists/oss-security/2025/07/10/2
http://www.openwall.com/lists/oss-security/2025/07/10/9
https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html