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TI-2017-07178 Aliases CVE-2017-9798GHSA-jxf6-fx3m-8x2r

Use after free in Apache HTTP Server

Priority HIGH 77CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 37 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

Apache httpd allows remote attackers to read secret data from process memory if the Limit directive can be set in a user's .htaccess file, or if httpd.conf has certain misconfigurations, aka Optionsbleed. This affects the Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27. The attacker sends an unauthenticated OPTIONS HTTP request when attempting to read secret data. This is a use-after-free issue and thus secret data is not always sent, and the specific data depends on many factors including configuration. Exploitation with .htaccess can be blocked with a patch to the ap_limit_section function in server/core.c.

Why it matters now

EPSS 0.94651 99th percentileScored 2026-11-07
Public exploit Yes 4 exploit referencesTagged by NVD and the CNA
Fix Partial Red Hat: 13 advisoriesRed Hat: 37 fixed, 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache HTTP ServerApache HTTP Server through 2.2.34 and 2.4.x through 2.4.27—No fix listedCNA
  • Apache HTTP Server VendorApache Affected Apache HTTP Server through 2.2.34 and 2.4.x through 2.4.27 Fixed in — No fix listed CNA

CPE configurations NVD · 22

CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*up to 2.2.34VulnerableApache
cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*2.4.0VulnerableApache
cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*2.4.1VulnerableApache
cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*2.4.2VulnerableApache
cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*2.4.3VulnerableApache
cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:*2.4.4VulnerableApache
cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*2.4.6VulnerableApache
cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*2.4.7VulnerableApache
cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*2.4.9VulnerableApache
cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*2.4.10VulnerableApache
  • cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions up to 2.2.34 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:* Versions 2.4.1 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:* Versions 2.4.2 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:* Versions 2.4.3 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.4:*:*:*:*:*:*:* Versions 2.4.4 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:* Versions 2.4.6 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:* Versions 2.4.7 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:* Versions 2.4.9 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:* Versions 2.4.10 Vulnerable ·Apache
Show 12 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*2.4.12VulnerableApache
cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*2.4.16VulnerableApache
cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:*2.4.17VulnerableApache
cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:*2.4.18VulnerableApache
cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*2.4.20VulnerableApache
cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:*2.4.23VulnerableApache
cpe:2.3:a:apache:http_server:2.4.25:*:*:*:*:*:*:*2.4.25VulnerableApache
cpe:2.3:a:apache:http_server:2.4.26:*:*:*:*:*:*:*2.4.26VulnerableApache
cpe:2.3:a:apache:http_server:2.4.27:*:*:*:*:*:*:*2.4.27VulnerableApache
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*7.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:* Versions 2.4.12 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:* Versions 2.4.16 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.17:*:*:*:*:*:*:* Versions 2.4.17 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.18:*:*:*:*:*:*:* Versions 2.4.18 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:* Versions 2.4.20 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.23:*:*:*:*:*:*:* Versions 2.4.23 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.25:*:*:*:*:*:*:* Versions 2.4.25 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.26:*:*:*:*:*:*:* Versions 2.4.26 Vulnerable ·Apache
  • cpe:2.3:a:apache:http_server:2.4.27:*:*:*:*:*:*:* Versions 2.4.27 Vulnerable ·Apache
  • cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 13 advisories

  • RHSA-2017:3477 Released 2017-12-15 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.23 security update
    • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-httpd-2.4.23-125.jbcs.el6, jbcs-httpd24-httpd-devel-2.4.23-125.jbcs.el6, jbcs-httpd24-httpd-libs-2.4.23-125.jbcs.el6 +9
  • RHSA-2017:3476 Released 2017-12-15 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.23 security update
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd-2.4.23-125.jbcs.el7, jbcs-httpd24-httpd-devel-2.4.23-125.jbcs.el7, jbcs-httpd24-httpd-libs-2.4.23-125.jbcs.el7 +9
  • RHSA-2017:3475 Released 2017-12-15 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.23 security update
    • Red Hat JBoss Core Services
Show 10 more Red Hat advisories
  • RHSA-2017:3240 Released 2017-11-16 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 6.4.18 security update
    • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6 Server httpd-2.2.26-57.ep6.el6, httpd-2.2.26-57.ep6.el6.i386, httpd-devel-2.2.26-57.ep6.el6 +16
    • Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7 Server httpd22-2.2.26-58.ep6.el7, httpd22-devel-2.2.26-58.ep6.el7, httpd22-manual-2.2.26-58.ep6.el7 +9
  • RHSA-2017:3239 Released 2017-11-16 · Red Hat rating Important
    Red Hat JBoss Enterprise Application Platform 6.4.18 security update
    • Red Hat JBoss Enterprise Application Platform 6.4
  • RHSA-2017:3194 Released 2017-11-13 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) httpd-2.4.6-45.el7_3.5, httpd-devel-2.4.6-45.el7_3.5, httpd-manual-2.4.6-45.el7_3.5 +5
    • Red Hat Enterprise Linux Server EUS (v. 7.3) httpd-2.4.6-45.el7_3.5, httpd-devel-2.4.6-45.el7_3.5, httpd-manual-2.4.6-45.el7_3.5 +2
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.3) mod_ldap-2.4.6-45.el7_3.5, mod_proxy_html-1:2.4.6-45.el7_3.5, mod_session-2.4.6-45.el7_3.5
  • RHSA-2017:3195 Released 2017-11-13 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) httpd-2.2.15-47.el6_7.5, httpd-tools-2.2.15-47.el6_7.5
    • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) httpd-devel-2.2.15-47.el6_7.5, httpd-manual-2.2.15-47.el6_7.5, mod_ssl-1:2.2.15-47.el6_7.5
    • Red Hat Enterprise Linux Server EUS (v. 6.7) httpd-2.2.15-47.el6_7.5, httpd-devel-2.2.15-47.el6_7.5, httpd-devel-2.2.15-47.el6_7.5.ppc +3
  • RHSA-2017:3193 Released 2017-11-13 · Red Hat rating Important
    httpd security update
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) httpd-2.4.6-40.el7_2.6, httpd-devel-2.4.6-40.el7_2.6, httpd-manual-2.4.6-40.el7_2.6 +5
    • Red Hat Enterprise Linux Server EUS (v. 7.2) httpd-2.4.6-40.el7_2.6, httpd-devel-2.4.6-40.el7_2.6, httpd-manual-2.4.6-40.el7_2.6 +2
    • Red Hat Enterprise Linux Server Optional EUS (v. 7.2) mod_ldap-2.4.6-40.el7_2.6, mod_proxy_html-1:2.4.6-40.el7_2.6, mod_session-2.4.6-40.el7_2.6
  • RHSA-2017:3113 Released 2017-11-02 · Red Hat rating Important
    Red Hat JBoss Web Server security and bug fix update
    • Red Hat JBoss Enterprise Web Server 2 for RHEL 6 Server httpd-2.2.26-57.ep6.el6, httpd-2.2.26-57.ep6.el6.i386, httpd-devel-2.2.26-57.ep6.el6 +38
    • Red Hat JBoss Enterprise Web Server 2 for RHEL 7 Server httpd22-2.2.26-58.ep6.el7, httpd22-devel-2.2.26-58.ep6.el7, httpd22-manual-2.2.26-58.ep6.el7 +31
  • RHSA-2017:3114 Released 2017-11-02 · Red Hat rating Important
    Red Hat JBoss Web Server security and bug fix update
    • Red Hat JBoss Web Server 2.1
  • RHSA-2017:3018 Released 2017-10-24 · Red Hat rating Moderate
    httpd24 security, bug fix, and enhancement update
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-1.1-18.el6, httpd24-httpd-2.4.27-8.el6, httpd24-httpd-devel-2.4.27-8.el6 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-1.1-18.el7, httpd24-curl-7.47.1-4.el7, httpd24-httpd-2.4.27-8.el7 +15
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7) httpd24-1.1-18.el6, httpd24-httpd-2.4.27-8.el6, httpd24-httpd-devel-2.4.27-8.el6 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3) httpd24-1.1-18.el7, httpd24-curl-7.47.1-4.el7, httpd24-httpd-2.4.27-8.el7 +15
    • Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4) httpd24-1.1-18.el7, httpd24-curl-7.47.1-4.el7, httpd24-httpd-2.4.27-8.el7 +15
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-1.1-18.el6, httpd24-httpd-2.4.27-8.el6, httpd24-httpd-devel-2.4.27-8.el6 +8
    • Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-1.1-18.el7, httpd24-curl-7.47.1-4.el7, httpd24-httpd-2.4.27-8.el7 +15
  • RHSA-2017:2972 Released 2017-10-19 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux Desktop (v. 6) httpd-2.2.15-60.el6_9.6, httpd-tools-2.2.15-60.el6_9.6
    • Red Hat Enterprise Linux Desktop Optional (v. 6) httpd-devel-2.2.15-60.el6_9.6, httpd-manual-2.2.15-60.el6_9.6, mod_ssl-1:2.2.15-60.el6_9.6
    • Red Hat Enterprise Linux HPC Node (v. 6) httpd-2.2.15-60.el6_9.6, httpd-tools-2.2.15-60.el6_9.6
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) httpd-devel-2.2.15-60.el6_9.6, httpd-manual-2.2.15-60.el6_9.6, mod_ssl-1:2.2.15-60.el6_9.6
    • Red Hat Enterprise Linux Server (v. 6) httpd-2.2.15-60.el6_9.6, httpd-devel-2.2.15-60.el6_9.6, httpd-devel-2.2.15-60.el6_9.6.ppc +3
    • Red Hat Enterprise Linux Workstation (v. 6) httpd-2.2.15-60.el6_9.6, httpd-devel-2.2.15-60.el6_9.6, httpd-manual-2.2.15-60.el6_9.6 +2
  • RHSA-2017:2882 Released 2017-10-11 · Red Hat rating Moderate
    httpd security update
    • Red Hat Enterprise Linux Client Optional (v. 7) httpd-2.4.6-67.el7_4.5, httpd-devel-2.4.6-67.el7_4.5, httpd-manual-2.4.6-67.el7_4.5 +5
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) httpd-2.4.6-67.el7_4.5, httpd-devel-2.4.6-67.el7_4.5, httpd-manual-2.4.6-67.el7_4.5 +5
    • Red Hat Enterprise Linux Server (v. 7) httpd-2.4.6-67.el7_4.5, httpd-devel-2.4.6-67.el7_4.5, httpd-manual-2.4.6-67.el7_4.5 +3
    • Red Hat Enterprise Linux Server Optional (v. 7) mod_ldap-2.4.6-67.el7_4.5, mod_proxy_html-1:2.4.6-67.el7_4.5
    • Red Hat Enterprise Linux Workstation (v. 7) httpd-2.4.6-67.el7_4.5, httpd-devel-2.4.6-67.el7_4.5, httpd-manual-2.4.6-67.el7_4.5 +3
    • Red Hat Enterprise Linux Workstation Optional (v. 7) mod_ldap-2.4.6-67.el7_4.5, mod_proxy_html-1:2.4.6-67.el7_4.5

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 1Affected—
Red Hat JBoss Web Server 3AffectedNo fix planned: Will not fix
Red Hat Software CollectionsAffectedNo fix yet
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2017:2882
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2017:2882
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2)Fixed RHSA-2017:3193
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3)Fixed RHSA-2017:3194
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux HPC Node EUS (v. 6.7)Fixed RHSA-2017:3195
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7)Fixed RHSA-2017:3195
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:2882
Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2017:3195
Red Hat Enterprise Linux Server EUS (v. 7.2)Fixed RHSA-2017:3193
Red Hat Enterprise Linux Server EUS (v. 7.3)Fixed RHSA-2017:3194
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2017:2882
Red Hat Enterprise Linux Server Optional EUS (v. 7.2)Fixed RHSA-2017:3193
Red Hat Enterprise Linux Server Optional EUS (v. 7.3)Fixed RHSA-2017:3194
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:2972
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:2882
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2017:2882
Red Hat JBoss Core ServicesFixed RHSA-2017:3475
Red Hat JBoss Core Services on RHEL 6 ServerFixed RHSA-2017:3477
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2017:3476
Red Hat JBoss Enterprise Application Platform 6.4Fixed RHSA-2017:3239
Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 6 ServerFixed RHSA-2017:3240
Red Hat JBoss Enterprise Application Platform 6.4 for RHEL 7 ServerFixed RHSA-2017:3240
Red Hat JBoss Enterprise Web Server 2 for RHEL 6 ServerFixed RHSA-2017:3113
Red Hat JBoss Enterprise Web Server 2 for RHEL 7 ServerFixed RHSA-2017:3113
Red Hat JBoss Web Server 2.1Fixed RHSA-2017:3114
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 6.7)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.3)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.4)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2017:3018
Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2017:3018
Not affected: 1 product
  • Red Hat JBoss Enterprise Application Platform 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-9798
  2. 2026-10-03 Alias added: GHSA-jxf6-fx3m-8x2r

References

Exploit 4

Patch 7

Advisory 22

Other 19

  • 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