CVE-2019-10097
HighExploitedIn 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.
Published Sep 26, 2019 · Updated Sep 23, 2026 · Also known as ALPINE-CVE-2019-10097, DEBIAN-CVE-2019-10097
Key Facts
Patch immediately- CVE-2019-10097 is a high-severity vulnerability (CVSS 7.2 v3.1) affecting HTTP Server (Apache), Communications Element Manager (Oracle), Communications Session Report Manager (Oracle) and 22 more products.
- It is exploited in the wild, listed in Industry KEV feed since Feb 22, 2022. No public exploit code is known.
- EPSS estimates a 53% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache2 2.4.33-3.21.1, apache2 2.4.33-lp151.8.6.1, apache2 2.4.41-1.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
7.2
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
53%
Higher than 98.9% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
None known
Get the full CVE-2019-10097 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Feb 22, 2022 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
140 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | 2.4.33, 2.4.34, 2.4.35, 2.4.37, 2.4.38, 12.2.1.4.0, >= 2.4.32 to 2.4.39 | n/a |
| Communications Element ManagerOracle | 8.0.0, 8.1.0, 8.1.1, 8.2.0 | n/a |
| Communications Session Report ManagerOracle | 8.1.1, 8.2.0, 8.2.1 | n/a |
| Communications Session Route ManagerOracle | 8.1.1, 8.2.0, 8.2.1 | n/a |
| Enterprise Manager Ops CenterOracle | 12.3.3, 12.4.0 | n/a |
Patched Releases
apache2
2.4.33-3.21.1, 2.4.33-lp151.8.6.1, 2.4.41-1, 2.4.41-r0, 2.4.49-1.1
apache2-devel
2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-doc
2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-event
2.4.33-lp151.8.6.1
apache2-example-pages
2.4.33-lp151.8.6.1
apache2-prefork
2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-utils
2.4.33-3.21.1, 2.4.33-lp151.8.6.1
apache2-worker
2.4.33-3.21.1, 2.4.33-lp151.8.6.1
httpd
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1, NA
httpd-devel
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1
httpd-filesystem
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1
httpd-manual
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1
httpd-tools
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.41-1.amzn2.0.1
httpd:2.4
8030020200818000036.30b713e6
httpd24
0:1.1-19.el6, 0:1.1-19.el7, 2.4.41-1.88.amzn1
httpd24-devel
2.4.41-1.88.amzn1
httpd24-httpd
0:2.4.34-15.el6, 0:2.4.34-15.el7
httpd24-manual
2.4.41-1.88.amzn1
httpd24-nghttp2
0:1.7.1-8.el6, 0:1.7.1-8.el7
httpd24-tools
2.4.41-1.88.amzn1
jbcs-httpd24-apr
0:1.6.3-86.jbcs.el6, 0:1.6.3-86.jbcs.el7
jbcs-httpd24-brotli
0:1.0.6-21.jbcs.el6, 0:1.0.6-21.jbcs.el7
jbcs-httpd24-httpd
0:2.4.37-52.jbcs.el6, 0:2.4.37-52.jbcs.el7
jbcs-httpd24-mod_cluster-native
0:1.3.12-41.Final_redhat_2.jbcs.el6, 0:1.3.12-41.Final_redhat_2.jbcs.el7
jbcs-httpd24-mod_http2
0:1.11.3-22.jbcs.el6, 0:1.11.3-22.jbcs.el7
Timeline
Publicly disclosed
Sep 26, 2019
Added to Industry KEV feed
Feb 22, 2022
Last updated
Sep 23, 2026
Weakness Type
- CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
- CWE-476 NULL Pointer Dereference
- CWE-787 Out-of-bounds Write
References
- advisoryRHSA-2019:4126
- advisoryRHSA-2020:1336
- advisoryRHSA-2020:1337
- advisoryRHSA-2020:4751
- advisoryhttps://bugzilla.suse.com/1145575
FAQ
Common Questions.
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.
Affected: HTTP Server (Apache) versions 2.4.33, 2.4.34, 2.4.35, 2.4.37, 2.4.38, 12.2.1.4.0, >= 2.4.32 to 2.4.39; Communications Element Manager (Oracle) versions 8.0.0, 8.1.0, 8.1.1, 8.2.0; Communications Session Report Manager (Oracle) versions 8.1.1, 8.2.0, 8.2.1, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Feb 22, 2022.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including apache2 2.4.33-3.21.1, apache2 2.4.33-lp151.8.6.1, apache2 2.4.41-1.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2019-10097 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo