NULL pointer dereference in Apache HTTP Server
Priority MEDIUM 64CWE-476Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service, Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 11 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476, CWE-787 and the CVSS impact.
Summary
In Apache HTTP Server 2.4.32-2.4.39, when mod_remoteip was configured to use a trusted intermediary proxy server using the "PROXY" protocol, a specially crafted PROXY header could trigger a stack buffer overflow or NULL pointer deference. This vulnerability could only be triggered by a trusted proxy and not by untrusted HTTP clients.
Why it matters now
EPSS 0.52873 98th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 11 fixed, 2 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Apache HTTP Server | 2.4.32 to 2.4.39 | — | No fix listed | CNA |
- Apache HTTP Server Vendor— Affected 2.4.32 to 2.4.39 Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:2.4.33:*:*:*:*:*:*:* | 2.4.33 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.4.34:*:*:*:*:*:*:* | 2.4.34 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.4.35:*:*:*:*:*:*:* | 2.4.35 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.4.37:*:*:*:*:*:*:* | 2.4.37 | Vulnerable | Apache |
| cpe:2.3:a:apache:http_server:2.4.38:*:*:*:*:*:*:* | 2.4.38 | Vulnerable | Apache |
| cpe:2.3:a:oracle:communications_element_manager:8.0.0:*:*:*:*:*:*:* | 8.0.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_element_manager:8.1.0:*:*:*:*:*:*:* | 8.1.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_element_manager:8.1.1:*:*:*:*:*:*:* | 8.1.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_element_manager:8.2.0:*:*:*:*:*:*:* | 8.2.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_session_report_manager:8.1.1:*:*:*:*:*:*:* | 8.1.1 | Vulnerable | Oracle |
- cpe:2.3:a:apache:http_server:2.4.33:*:*:*:*:*:*:* Versions 2.4.33 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.4.34:*:*:*:*:*:*:* Versions 2.4.34 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.4.35:*:*:*:*:*:*:* Versions 2.4.35 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.4.37:*:*:*:*:*:*:* Versions 2.4.37 Vulnerable ·Apache
- cpe:2.3:a:apache:http_server:2.4.38:*:*:*:*:*:*:* Versions 2.4.38 Vulnerable ·Apache
- cpe:2.3:a:oracle:communications_element_manager:8.0.0:*:*:*:*:*:*:* Versions 8.0.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_element_manager:8.1.0:*:*:*:*:*:*:* Versions 8.1.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_element_manager:8.1.1:*:*:*:*:*:*:* Versions 8.1.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_element_manager:8.2.0:*:*:*:*:*:*:* Versions 8.2.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_session_report_manager:8.1.1:*:*:*:*:*:*:* Versions 8.1.1 Vulnerable ·Oracle
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oracle:communications_session_report_manager:8.2.0:*:*:*:*:*:*:* | 8.2.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_session_report_manager:8.2.1:*:*:*:*:*:*:* | 8.2.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_session_route_manager:8.1.1:*:*:*:*:*:*:* | 8.1.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_session_route_manager:8.2.0:*:*:*:*:*:*:* | 8.2.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:communications_session_route_manager:8.2.1:*:*:*:*:*:*:* | 8.2.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:* | 12.3.3 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0:*:*:*:*:*:*:* | 12.4.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* | 12.2.1.4.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:instantis_enterprisetrack:*:*:*:*:*:*:*:* | 17.1 – 17.3 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:* | 7.1 | Vulnerable | Oracle |
- cpe:2.3:a:oracle:communications_session_report_manager:8.2.0:*:*:*:*:*:*:* Versions 8.2.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_session_report_manager:8.2.1:*:*:*:*:*:*:* Versions 8.2.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_session_route_manager:8.1.1:*:*:*:*:*:*:* Versions 8.1.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_session_route_manager:8.2.0:*:*:*:*:*:*:* Versions 8.2.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:communications_session_route_manager:8.2.1:*:*:*:*:*:*:* Versions 8.2.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.3:*:*:*:*:*:*:* Versions 12.3.3 Vulnerable ·Oracle
- cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0:*:*:*:*:*:*:* Versions 12.4.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:* Versions 12.2.1.4.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:instantis_enterprisetrack:*:*:*:*:*:*:*:* Versions 17.1 – 17.3 Vulnerable ·Oracle
- cpe:2.3:a:oracle:retail_xstore_point_of_service:7.1:*:*:*:*:*:*:* Versions 7.1 Vulnerable ·Oracle
Remediation
Red Hat 4 advisories
- RHSA-2020:4751 Released 2020-11-04 · Red Hat rating Moderatehttpd:2.4 security, bug fix, and enhancement update
- Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-30.module+el8.3.0+7001+0766b9e7.aarch64::httpd:2.4, httpd-2.4.37-30.module+el8.3.0+7001+0766b9e7.ppc64le::httpd:2.4, httpd-2.4.37-30.module+el8.3.0+7001+0766b9e7.s390x::httpd:2.4 +38
- RHSA-2020:1337 Released 2020-04-06 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update
- Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr-1.6.3-86.jbcs.el6, jbcs-httpd24-apr-devel-1.6.3-86.jbcs.el6, jbcs-httpd24-brotli-1.0.6-21.jbcs.el6 +17
- Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-1.6.3-86.jbcs.el7, jbcs-httpd24-apr-devel-1.6.3-86.jbcs.el7, jbcs-httpd24-brotli-1.0.6-21.jbcs.el7 +17
- RHSA-2020:1336 Released 2020-04-06 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.37 SP2 security update
- JBoss Core Services Apache HTTP Server 2.4.37 SP2
Show 1 more Red Hat advisories
- RHSA-2019:4126 Released 2019-12-10 · Red Hat rating Moderatehttpd24-httpd security, bug fix, and enhancement update
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) httpd24-1.1-19.el6, httpd24-build-1.1-19.el6, httpd24-httpd-2.4.34-15.el6 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) httpd24-1.1-19.el6, httpd24-build-1.1-19.el6, httpd24-httpd-2.4.34-15.el6 +12
- Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-1.1-19.el7, httpd24-httpd-2.4.34-15.el7, httpd24-httpd-devel-2.4.34-15.el7 +12
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat JBoss Enterprise Web Server 2 | Affected | No fix planned: Out of support scope |
| Red Hat JBoss Web Server 3 | Affected | No fix planned: Out of support scope |
| JBoss Core Services Apache HTTP Server 2.4.37 SP2 | Fixed | RHSA-2020:1336 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2020:4751 |
| Red Hat JBoss Core Services on RHEL 6 Server | Fixed | RHSA-2020:1337 |
| Red Hat JBoss Core Services on RHEL 7 Server | Fixed | RHSA-2020:1337 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.5) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2019:4126 |
Not affected: 3 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
Timeline
- 2026-10-02 Threatist record created from CVE-2019-10097
- 2026-10-03 Alias added: GHSA-x7xg-9vq9-q8xh
References
Advisory 6
- RHSA-2019:4126
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://httpd.apache.org/security/vulnerabilities_24.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
Other 11
- [httpd-cvs] 20200401 svn commit: r1058586 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20200401 svn commit: r1058587 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/vulnerabilities-httpd.xml security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210330 svn commit: r1073139 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1073143 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/
- [httpd-cvs] 20210330 svn commit: r1073140 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/cvejsontohtml.py security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210330 svn commit: r1073139 [12/13] - in /websites/staging/httpd/trunk/content: ./ security/json/
- [httpd-cvs] 20210330 svn commit: r1888194 [12/13] - /httpd/site/trunk/content/security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [1/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210330 svn commit: r1073149 [13/13] - in /websites/staging/httpd/trunk/content: ./ security/ security/json/
- [httpd-cvs] 20210603 svn commit: r1075360 [3/3] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2021-31618.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
- [httpd-cvs] 20210606 svn commit: r1075470 [4/4] - in /websites/staging/httpd/trunk/content: ./ security/json/CVE-2020-13938.json security/vulnerabilities_13.html security/vulnerabilities_20.html security/vulnerabilities_22.html security/vulnerabilities_24.html
Sources
- CVE-2019-10097 · CVE Program
- CVE-2019-10097 · NVD
- FIRST EPSS
- GHSA-x7xg-9vq9-q8xh · GitHub Advisory Database · CC BY 4.0
- CVE-2019-10097 · Red Hat security data · CC BY 4.0
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