httpd: null-pointer dereference in mod_remoteip
Published Sep 26, 2019
7.2
HIGHCVSS 3.1
EPSS 52.87%
Description
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.
Affected products
- Vendor n/a Product Apache HTTP Server Defaultn/a
- Version 2.4.32 to 2.4.39StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Apache HTTP Server | n/a |
|
Configuration 1
- 2.4.33
- 2.4.34
- 2.4.35
- 2.4.37
- 2.4.38
Configuration 2
- 8.0.0
- 8.1.0
- 8.1.1
- 8.2.0
- 8.1.1
- 8.2.0
- 8.2.1
- 8.1.1
- 8.2.0
- 8.2.1
- 12.3.3
- 12.4.0
- 12.2.1.4.0
- ≥ 17.1 · ≤ 17.3
- 7.1
No data.
JBoss Core Services Apache HTTP Server 2.4.37 SP2
httpd
Fixed · RHSA-2020:1336
JBoss Core Services on RHEL 6
jbcs-httpd24-apr-0:1.6.3-86.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 6
jbcs-httpd24-brotli-0:1.0.6-21.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 6
jbcs-httpd24-httpd-0:2.4.37-52.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_cluster-native-0:1.3.12-41.Final_redhat_2.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 6
jbcs-httpd24-mod_http2-0:1.11.3-22.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 6
jbcs-httpd24-openssl-1:1.1.1c-16.jbcs.el6
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-apr-0:1.6.3-86.jbcs.el7
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-brotli-0:1.0.6-21.jbcs.el7
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-httpd-0:2.4.37-52.jbcs.el7
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_cluster-native-0:1.3.12-41.Final_redhat_2.jbcs.el7
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-mod_http2-0:1.11.3-22.jbcs.el7
Fixed · RHSA-2020:1337
JBoss Core Services on RHEL 7
jbcs-httpd24-openssl-1:1.1.1c-16.jbcs.el7
Fixed · RHSA-2020:1337
Red Hat Enterprise Linux 8
httpd:2.4-8030020200818000036.30b713e6
Fixed · RHSA-2020:4751
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-0:1.1-19.el6
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-httpd-0:2.4.34-15.el6
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 6
httpd24-nghttp2-0:1.7.1-8.el6
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-0:1.1-19.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-httpd-0:2.4.34-15.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7
httpd24-nghttp2-0:1.7.1-8.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-0:1.1-19.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-httpd-0:2.4.34-15.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS
httpd24-nghttp2-0:1.7.1-8.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-0:1.1-19.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-httpd-0:2.4.34-15.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS
httpd24-nghttp2-0:1.7.1-8.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS
httpd24-0:1.1-19.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS
httpd24-httpd-0:2.4.34-15.el7
Fixed · RHSA-2019:4126
Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS
httpd24-nghttp2-0:1.7.1-8.el7
Fixed · RHSA-2019:4126
Red Hat Enterprise Linux 5
httpd
Not affected
Red Hat Enterprise Linux 6
httpd
Not affected
Red Hat Enterprise Linux 7
httpd
Not affected
Red Hat JBoss Enterprise Web Server 2
httpd
Out of support scope
Red Hat JBoss Enterprise Web Server 2
httpd22
Out of support scope
Red Hat JBoss Web Server 3
httpd24
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| JBoss Core Services Apache HTTP Server 2.4.37 SP2 | httpd | Fixed | RHSA-2020:1336 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-apr-0:1.6.3-86.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-brotli-0:1.0.6-21.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-httpd-0:2.4.37-52.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_cluster-native-0:1.3.12-41.Final_redhat_2.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-mod_http2-0:1.11.3-22.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-openssl-1:1.1.1c-16.jbcs.el6 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-apr-0:1.6.3-86.jbcs.el7 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-brotli-0:1.0.6-21.jbcs.el7 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-httpd-0:2.4.37-52.jbcs.el7 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_cluster-native-0:1.3.12-41.Final_redhat_2.jbcs.el7 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-mod_http2-0:1.11.3-22.jbcs.el7 | Fixed | RHSA-2020:1337 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-openssl-1:1.1.1c-16.jbcs.el7 | Fixed | RHSA-2020:1337 |
| Red Hat Enterprise Linux 8 | httpd:2.4-8030020200818000036.30b713e6 | Fixed | RHSA-2020:4751 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-0:1.1-19.el6 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-httpd-0:2.4.34-15.el6 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 6 | httpd24-nghttp2-0:1.7.1-8.el6 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-0:1.1-19.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-httpd-0:2.4.34-15.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7 | httpd24-nghttp2-0:1.7.1-8.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-0:1.1-19.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-httpd-0:2.4.34-15.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS | httpd24-nghttp2-0:1.7.1-8.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-0:1.1-19.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-httpd-0:2.4.34-15.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUS | httpd24-nghttp2-0:1.7.1-8.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS | httpd24-0:1.1-19.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS | httpd24-httpd-0:2.4.34-15.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Software Collections for Red Hat Enterprise Linux 7.7 EUS | httpd24-nghttp2-0:1.7.1-8.el7 | Fixed | RHSA-2019:4126 |
| Red Hat Enterprise Linux 5 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 6 | httpd | Not affected | n/a |
| Red Hat Enterprise Linux 7 | httpd | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | httpd | Out of support scope | n/a |
| Red Hat JBoss Enterprise Web Server 2 | httpd22 | Out of support scope | n/a |
| Red Hat JBoss Web Server 3 | httpd24 | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
Red Hat mitigation
This flaw is only exploitable if RemoteIP* directives are used in Apache httpd configuration. The following command can be used to search for possible vulnerable configurations: grep -R '^\s*RemoteIP' /etc/httpd/ See https://httpd.apache.org/docs/2.4/mod/mod_remoteip.html
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:M/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (59 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 52.87% (0.52873) | 98.94th | v5 (v2026.06.15) |
| Jun 15, 2026 | 52.72% (0.52718) | 98.83th | v5 (v2026.06.15) |
| Mar 17, 2026 | 22.91% (0.22907) | 95.82th | v4 (v2025.03.14) |
| Mar 4, 2026 | 26.14% (0.26139) | 96.18th | v4 (v2025.03.14) |
| Mar 1, 2026 | 10.04% (0.10041) | 92.97th | v4 (v2025.03.14) |
| Feb 18, 2026 | 26.14% (0.26139) | 96.17th | v4 (v2025.03.14) |
| Feb 4, 2026 | 22.91% (0.22907) | 95.75th | v4 (v2025.03.14) |
| Feb 1, 2026 | 10.04% (0.10041) | 92.91th | v4 (v2025.03.14) |
| Jan 26, 2026 | 22.91% (0.22907) | 95.73th | v4 (v2025.03.14) |
| Jan 4, 2026 | 26.41% (0.26406) | 96.14th | v4 (v2025.03.14) |
| Jan 1, 2026 | 11.08% (0.11080) | 93.26th | v4 (v2025.03.14) |
| Dec 28, 2025 | 27.36% (0.27358) | 96.24th | v4 (v2025.03.14) |
| Dec 27, 2025 | 16.00% (0.16003) | 94.58th | v4 (v2025.03.14) |
| Dec 4, 2025 | 26.43% (0.26426) | 96.12th | v4 (v2025.03.14) |
| Dec 1, 2025 | 10.49% (0.10494) | 93.01th | v4 (v2025.03.14) |
| Nov 21, 2025 | 26.43% (0.26426) | 96.11th | v4 (v2025.03.14) |
| Nov 18, 2025 | 90.09% (0.90094) | 99.67th | v4 (v2025.03.14) |
| Nov 4, 2025 | 26.43% (0.26426) | 96.09th | v4 (v2025.03.14) |
| Nov 1, 2025 | 10.49% (0.10494) | 92.94th | v4 (v2025.03.14) |
| Oct 28, 2025 | 26.43% (0.26426) | 96.08th | v4 (v2025.03.14) |
| Oct 27, 2025 | 15.36% (0.15357) | 94.35th | v4 (v2025.03.14) |
| Oct 4, 2025 | 26.43% (0.26426) | 96.14th | v4 (v2025.03.14) |
| Oct 1, 2025 | 10.49% (0.10494) | 93.00th | v4 (v2025.03.14) |
| Sep 4, 2025 | 15.36% (0.15357) | 94.39th | v4 (v2025.03.14) |
| Sep 1, 2025 | 3.27% (0.03266) | 86.75th | v4 (v2025.03.14) |
| Aug 4, 2025 | 16.00% (0.16003) | 94.50th | v4 (v2025.03.14) |
| Aug 1, 2025 | 3.65% (0.03646) | 87.50th | v4 (v2025.03.14) |
| Jul 30, 2025 | 16.00% (0.16003) | 94.49th | v4 (v2025.03.14) |
| Jul 4, 2025 | 27.36% (0.27358) | 96.17th | v4 (v2025.03.14) |
| Jul 1, 2025 | 11.59% (0.11589) | 93.35th | v4 (v2025.03.14) |
| Jun 6, 2025 | 27.36% (0.27358) | 96.12th | v4 (v2025.03.14) |
| Jun 4, 2025 | 30.16% (0.30165) | 96.41th | v4 (v2025.03.14) |
| Jun 1, 2025 | 11.74% (0.11741) | 93.34th | v4 (v2025.03.14) |
| May 30, 2025 | 30.16% (0.30165) | 96.40th | v4 (v2025.03.14) |
| May 16, 2025 | 26.03% (0.26029) | 95.96th | v4 (v2025.03.14) |
| May 4, 2025 | 30.16% (0.30165) | 96.37th | v4 (v2025.03.14) |
| May 1, 2025 | 11.74% (0.11741) | 93.32th | v4 (v2025.03.14) |
| Apr 18, 2025 | 30.16% (0.30165) | 96.35th | v4 (v2025.03.14) |
| Mar 30, 2025 | 35.70% (0.35696) | 96.75th | v4 (v2025.03.14) |
| Mar 29, 2025 | 41.59% (0.41585) | 96.13th | v4 (v2025.03.14) |
| Mar 17, 2025 | 35.70% (0.35696) | 96.71th | v4 (v2025.03.14) |
| Dec 17, 2024 | 84.68% (0.84682) | 98.72th | v3 (v2023.03.01) |
| Sep 19, 2024 | 81.08% (0.81084) | 98.39th | v3 (v2023.03.01) |
| Nov 8, 2023 | 83.05% (0.83054) | 98.11th | v3 (v2023.03.01) |
| Aug 17, 2023 | 93.41% (0.93409) | 98.71th | v3 (v2023.03.01) |
| Jul 16, 2023 | 93.81% (0.93810) | 98.74th | v3 (v2023.03.01) |
| Jun 13, 2023 | 94.94% (0.94943) | 98.92th | v3 (v2023.03.01) |
| May 10, 2023 | 94.37% (0.94369) | 98.75th | v3 (v2023.03.01) |
| Apr 5, 2023 | 93.99% (0.93991) | 98.65th | v3 (v2023.03.01) |
| Mar 7, 2023 | 94.22% (0.94222) | 98.64th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.52% (0.03525) | 84.86th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.52% (0.03525) | 83.30th | v2 (v2022.01.01) |
| Feb 4, 2022 | 31.97% (0.31966) | 96.51th | v2 (v2022.01.01) |
| Feb 3, 2022 | 34.02% (0.34016) | 97.73th | v1 |
| Jan 6, 2022 | 34.02% (0.34016) | 97.70th | v1 |
| Sep 1, 2021 | 10.31% (0.10306) | 95.04th | v1 |
| Jun 8, 2021 | 10.31% (0.10306) | 0.00th | v1 |
| Jun 3, 2021 | 9.79% (0.09785) | 0.00th | v1 |
| Apr 14, 2021 | 9.26% (0.09259) | 0.00th | v1 |
References (21)
- https://access.redhat.com/errata/RHSA-2019:4126 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-10097 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1743996 Issue Tracking
- https://httpd.apache.org/security/vulnerabilities_24.html x_refsource_MISCVendor Advisory
- https://lists.apache.org/thread.html/r03ee478b3dda3e381fd6189366fa7af97c980d2f602846eef935277d%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r06f0d87ebb6d59ed8379633f36f72f5b1f79cadfda72ede0830b42cf%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r3c5c3104813c1c5508b55564b66546933079250a46ce50eee90b2e36%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd2fb621142e7fa187cfe12d7137bf66e7234abcbbcd800074c84a538%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rd336919f655b7ff309385e34a143e41c503e133da80414485b3abcc9%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://lists.apache.org/thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apache.org%3E mailing-listx_refsource_MLIST
- https://nvd.nist.gov/vuln/detail/CVE-2019-10097
- https://www.cve.org/CVERecord?id=CVE-2019-10097
- https://www.oracle.com/security-alerts/cpuapr2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISCThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html x_refsource_MISCThird Party Advisory
Change history (0)
No recorded changes yet.