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TI-2025-16857 Aliases CVE-2025-23048GHSA-gh64-76r6-qhpc

Apache HTTP Server: mod_ssl access control bypass with session resumption

Priority HIGH 80CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-284.

Summary

In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption. Configurations are affected when mod_ssl is configured for multiple virtual hosts, with each restricted to a different set of trusted client certificates (for example with a different SSLCACertificateFile/Path setting). In such a case, a client trusted to access one virtual host may be able to access another virtual host, if SSLStrictSNIVHostCheck is not enabled in either virtual host.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0104 64th percentileScored 2026-11-07
Fix Fixed Red Hat: 12 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache HTTP Server2.4.35 – 2.4.63—No fix listedCNA
  • Apache HTTP Server VendorApache Affected 2.4.35 – 2.4.63 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*2.4.35 to before 2.4.64VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.35 to before 2.4.64 Vulnerable ·Apache

Remediation

Red Hat 12 advisories

  • RHSA-2025:15698 Released 2025-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.src::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4, httpd-devel-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4 +11
    • Red Hat Enterprise Linux AppStream E4S (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.aarch64::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.ppc64le::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.s390x::httpd:2.4 +38
    • Red Hat Enterprise Linux AppStream TUS (v.8.6) httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.src::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4, httpd-devel-2.4.37-47.module+el8.6.0+23463+5d5709c6.11.x86_64::httpd:2.4 +11
  • RHSA-2025:15684 Released 2025-09-11 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v.8.4) httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.src::httpd:2.4, httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4, httpd-devel-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4 +11
    • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.src::httpd:2.4, httpd-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4, httpd-devel-2.4.37-39.module+el8.4.0+23462+1fa78ba3.10.x86_64::httpd:2.4 +11
  • RHSA-2025:15619 Released 2025-09-10 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream E4S (v.8.8) httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.ppc64le::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.src::httpd:2.4, httpd-2.4.37-56.module+el8.8.0+23464+a2e0c444.10.x86_64::httpd:2.4 +20
Show 9 more Red Hat advisories
  • RHSA-2025:15516 Released 2025-09-08 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream AUS (v. 8.2) httpd-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.src::httpd:2.4, httpd-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.x86_64::httpd:2.4, httpd-devel-2.4.37-21.module+el8.2.0+23461+1d03af5c.10.x86_64::httpd:2.4 +11
  • RHSA-2025:15123 Released 2025-09-03 · Red Hat rating Moderate
    httpd:2.4 security update
    • Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.aarch64::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.ppc64le::httpd:2.4, httpd-2.4.37-65.module+el8.10.0+23369+11a81384.5.s390x::httpd:2.4 +38
  • RHSA-2025:15095 Released 2025-09-02 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 10) httpd-2.4.63-1.el10_0.2, httpd-core-2.4.63-1.el10_0.2, httpd-devel-2.4.63-1.el10_0.2 +8
  • RHSA-2025:15023 Released 2025-09-02 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream (v. 9) httpd-2.4.62-4.el9_6.4, httpd-core-2.4.62-4.el9_6.4, httpd-devel-2.4.62-4.el9_6.4 +8
  • RHSA-2025:14903 Released 2025-08-28 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream EUS (v.9.4) httpd-2.4.57-11.el9_4.3, httpd-core-2.4.57-11.el9_4.3, httpd-devel-2.4.57-11.el9_4.3 +8
  • RHSA-2025:14902 Released 2025-08-28 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) httpd-2.4.53-11.el9_2.13, httpd-core-2.4.53-11.el9_2.13, httpd-devel-2.4.53-11.el9_2.13 +8
  • RHSA-2025:14901 Released 2025-08-28 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.0) httpd-2.4.51-7.el9_0.10, httpd-devel-2.4.51-7.el9_0.10, httpd-filesystem-2.4.51-7.el9_0.10 +7
  • RHSA-2025:13681 Released 2025-08-14 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
    • Red Hat JBoss Core Services 2.4.62.SP1
  • RHSA-2025:13680 Released 2025-08-14 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.62 SP1 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd-2.4.62-8.el7jbcs, jbcs-httpd24-httpd-devel-2.4.62-8.el7jbcs, jbcs-httpd24-httpd-manual-2.4.62-8.el7jbcs +12
    • Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd-2.4.62-8.el8jbcs, jbcs-httpd24-httpd-devel-2.4.62-8.el8jbcs, jbcs-httpd24-httpd-manual-2.4.62-8.el8jbcs +12

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:15095
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2025:15123
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:15023
Red Hat Enterprise Linux AppStream AUS (v. 8.2)Fixed RHSA-2025:15516
Red Hat Enterprise Linux AppStream AUS (v.8.4)Fixed RHSA-2025:15684
Red Hat Enterprise Linux AppStream AUS (v.8.6)Fixed RHSA-2025:15698
Red Hat Enterprise Linux AppStream E4S (v.8.6)Fixed RHSA-2025:15698
Red Hat Enterprise Linux AppStream E4S (v.8.8)Fixed RHSA-2025:15619
Red Hat Enterprise Linux AppStream E4S (v.9.0)Fixed RHSA-2025:14901
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2025:14902
Red Hat Enterprise Linux AppStream EUS (v.9.4)Fixed RHSA-2025:14903
Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)Fixed RHSA-2025:15684
Red Hat Enterprise Linux AppStream TUS (v.8.6)Fixed RHSA-2025:15698
Red Hat JBoss Core Services 2.4.62.SP1Fixed RHSA-2025:13681
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2025:13680
Red Hat JBoss Core Services on RHEL 8Fixed RHSA-2025:13680
Not affected: 2 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-23048
  2. 2026-10-03 Alias added: GHSA-gh64-76r6-qhpc
  3. 2026-10-09 Fix available: RHSA-2025:13681 · Red Hat
  4. 2026-10-21 Fix available: Red Hat JBoss Core Services 2.4.62.SP1 · Red Hat

References

Advisory 1

  • TI-2021-18535 Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) KEVCVSS 3.1CRITICAL 9.8
  • TI-2021-18417 Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-25716 Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. KEVCVSS 3.1CRITICAL 9.1
  • TI-2021-17490 mod_proxy SSRF KEVCVSS 3.1CRITICAL 9.0
  • TI-2019-00184 Use after free in Apache HTTP Server KEVCVSS 3.1HIGH 7.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
See all 349 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences