mod_proxy_uwsgi out of bound read
Priority HIGH 68CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 6 fixed, 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-125 and the CVSS impact.
Summary
A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).
Why it matters now
EPSS 0.63721 99th percentileScored 2026-11-07
Fix Partial Red Hat: 4 advisoriesRed Hat: 6 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 | Apache HTTP Server | Apache HTTP Server 2.4 – 2.4.48 | — | No fix listed | CNA |
- Apache HTTP Server VendorApache Affected Apache HTTP Server 2.4 – 2.4.48 Fixed in — No fix listed CNA
CPE configurations NVD · 20
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* | 2.4.30 to before 2.4.49 | Vulnerable | Apache |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | 35 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* | 1.10.0 | Vulnerable | Oracle |
- cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:* Versions 2.4.30 to before 2.4.49 Vulnerable ·Apache
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* Versions 35 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:clustered_data_ontap:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:storagegrid:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:* Versions 1.10.0 Vulnerable ·Oracle
Show 10 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:* | 13.4.0.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:* | 13.5.0.0 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* | 12.2.1.3.0 | 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:*:*:*:*:*:*:* | 17.1 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* | 17.2 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* | 17.3 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* | 8.58 | Vulnerable | Oracle |
| cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* | 8.8 | Vulnerable | Oracle |
| cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Broadcom |
- cpe:2.3:a:oracle:enterprise_manager_base_platform:13.4.0.0:*:*:*:*:*:*:* Versions 13.4.0.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:enterprise_manager_base_platform:13.5.0.0:*:*:*:*:*:*:* Versions 13.5.0.0 Vulnerable ·Oracle
- cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* Versions 12.2.1.3.0 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:17.1:*:*:*:*:*:*:* Versions 17.1 Vulnerable ·Oracle
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.2:*:*:*:*:*:*:* Versions 17.2 Vulnerable ·Oracle
- cpe:2.3:a:oracle:instantis_enterprisetrack:17.3:*:*:*:*:*:*:* Versions 17.3 Vulnerable ·Oracle
- cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* Versions 8.58 Vulnerable ·Oracle
- cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:* Versions 8.8 Vulnerable ·Oracle
- cpe:2.3:o:broadcom:brocade_fabric_operating_system_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Broadcom
Remediation
Red Hat 4 advisories
- RHSA-2022:7143 Released 2022-10-26 · Red Hat rating ModerateRed Hat JBoss Core Services Apache HTTP Server 2.4.51 security update
- Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd-2.4.51-28.el7jbcs, jbcs-httpd24-httpd-devel-2.4.51-28.el7jbcs, jbcs-httpd24-httpd-manual-2.4.51-28.el7jbcs +6
- Red Hat JBoss Core Services on RHEL 8 jbcs-httpd24-httpd-2.4.51-28.el8jbcs, jbcs-httpd24-httpd-devel-2.4.51-28.el8jbcs, jbcs-httpd24-httpd-manual-2.4.51-28.el8jbcs +6
- RHSA-2022:7144 Released 2022-10-26 · Red Hat rating ImportantRed Hat JBoss Core Services Apache HTTP Server 2.4.51 security update
- Red Hat JBoss Core Services
- RHSA-2022:6753 Released 2022-09-29 · Red Hat rating Moderatehttpd24-httpd security and bug fix update
- Red Hat Software Collections for RHEL Workstation(v. 7) httpd24-httpd-2.4.34-23.el7.5, httpd24-httpd-devel-2.4.34-23.el7.5, httpd24-httpd-manual-2.4.34-23.el7.5 +5
- Red Hat Software Collections for RHEL(v. 7) httpd24-httpd-2.4.34-23.el7.5, httpd24-httpd-devel-2.4.34-23.el7.5, httpd24-httpd-manual-2.4.34-23.el7.5 +5
Show 1 more Red Hat advisories
- RHSA-2022:1915 Released 2022-05-10 · Red Hat rating Moderatehttpd:2.4 security and bug fix update
- Red Hat Enterprise Linux AppStream (v. 8) httpd-2.4.37-47.module+el8.6.0+14529+083145da.1.aarch64::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+14529+083145da.1.ppc64le::httpd:2.4, httpd-2.4.37-47.module+el8.6.0+14529+083145da.1.s390x::httpd:2.4 +38
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Apache HTTP Server — DSA-4982
4 records Highest priority Priority CRITICAL 1 CRITICAL, 3 HIGH
Other records, highest priority first
- TI-2021-17490 mod_proxy SSRFPriority CRITICAL 98
- TI-2021-16656 ap_escape_quotes buffer overflowPriority HIGH 69
- TI-2021-13795 NULL pointer dereference in httpd corePriority HIGH 69
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2022:1915 |
| Red Hat JBoss Core Services | Fixed | RHSA-2022:7144 |
| Red Hat JBoss Core Services on RHEL 7 Server | Fixed | RHSA-2022:7143 |
| Red Hat JBoss Core Services on RHEL 8 | Fixed | RHSA-2022:7143 |
| Red Hat Software Collections for RHEL Workstation(v. 7) | Fixed | RHSA-2022:6753 |
| Red Hat Software Collections for RHEL(v. 7) | Fixed | RHSA-2022:6753 |
Not affected: 4 products
- Red Hat Enterprise Linux 9
- Red Hat JBoss Core Services on RHEL 7 Server
- Red Hat JBoss Core Services on RHEL 8
- Red Hat JBoss Enterprise Application Platform 6
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36160
- 2026-10-03 Alias added: GHSA-f4wr-wvqf-r2q5
- 2026-10-09 Fix available: RHSA-2022:7144 · Red Hat
- 2026-10-09 Fix available: Red Hat JBoss Core Services · Red Hat
References
Patch 15
- [httpd-cvs] 20210916 [httpd-site] branch main updated: Revert "Add descriptions for CVE-2021-33193 CVE-2021-36160"
- [httpd-cvs] 20210916 [httpd-site] branch main updated: Add descriptions for CVE-2021-33193 CVE-2021-36160
- [httpd-users] 20210923 [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 Re: [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info
- [httpd-users] 20210923 Re: [users@httpd] Re: [External] : [users@httpd] 2.4.49 security fixes: more info
- [httpd-bugs] 20211005 [Bug 65616] New: CVE-2021-36160 regression
- [httpd-bugs] 20211005 [Bug 65616] CVE-2021-36160 regression
- [httpd-bugs] 20211006 [Bug 65616] CVE-2021-36160 regression
- [httpd-bugs] 20211008 [Bug 65616] CVE-2021-36160 regression
- [httpd-bugs] 20211009 [Bug 65616] CVE-2021-36160 regression
- [httpd-bugs] 20211011 [Bug 65616] CVE-2021-36160 regression
- [httpd-bugs] 20211012 [Bug 65616] CVE-2021-36160 regression
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
Advisory 9
- http://httpd.apache.org/security/vulnerabilities_24.html
- FEDORA-2021-dce7e7738e
- FEDORA-2021-e3f6dd670d
- [debian-lts-announce] 20210929 [SECURITY] [DLA 2768-1] uwsgi security update
- DSA-4982
- [debian-lts-announce] 20211020 [SECURITY] [DLA 2768-2] uwsgi regression update
- 20211124 Multiple Vulnerabilities in Apache HTTP Server Affecting Cisco Products: November 2021
- https://security.netapp.com/advisory/ntap-20211008-0004/
- GLSA-202208-20
More Apache Http Server vulnerabilities
- 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
Sources
- CVE-2021-36160 · CVE Program
- CVE-2021-36160 · NVD
- FIRST EPSS
- GHSA-f4wr-wvqf-r2q5 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-36160 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences