CVE-2020-1934
MediumIn Apache HTTP Server 2.4.0 to 2.4.41, mod_proxy_ftp may use uninitialized memory when proxying to a malicious FTP server.
Published Apr 1, 2020 · Updated Sep 8, 2026 · Also known as ALPINE-CVE-2020-1934, BIT-apache-2020-1934, DEBIAN-CVE-2020-1934, SUSE-SU-2020:14342-1, UBUNTU-CVE-2020-1934
Key Facts
Patch immediately- CVE-2020-1934 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting HTTP Server (Apache), Communications Element Manager (Oracle), Communications Session Report Manager (Oracle) and 22 more products.
- It is not listed in any known-exploited vulnerabilities catalog. No public exploit code is known.
- EPSS estimates a 52% probability of exploitation in the next 30 days.
- Fixed versions are available, including apache 2.4.42, apache 2.4.43-1, HTTP Server <=2.4.41.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
EPSS (30-day exploit likelihood)
52%
Higher than 98.9% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
None known
Get the full CVE-2020-1934 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 2.4.0 to 2.4.41, mod_proxy_ftp may use uninitialized memory when proxying to a malicious FTP server.
Affected Products
307 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| HTTP ServerApache | >= 2.4.0 to 2.4.41 | 2.4.41 |
| Communications Element ManagerOracle | 8.1.1, 8.2.0, 8.2.1 | 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 | 12.4.0.0 | n/a |
Patched Releases
apache
2.4.42, 2.4.43-1
HTTP Server
<=2.4.41
apache2
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.18-2ubuntu3.17, 2.4.23-29.54.1, 2.4.25-3+deb9u10, 2.4.29-1ubuntu4.14, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1, 2.4.38-3+deb10u4, 2.4.41-4ubuntu3.1, 2.4.43-1, 2.4.43-r0
apache2-devel
2.2.34-70.27.1, 2.4.23-29.54.1, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1
apache2-doc
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.23-29.54.1, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1
apache2-event
2.4.33-lp151.8.12.1
apache2-example-pages
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.23-29.54.1, 2.4.33-lp151.8.12.1
apache2-prefork
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.23-29.54.1, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1
apache2-utils
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.23-29.54.1, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1
apache2-worker
2.2.34-70.27.1, 2.4.16-20.29.1, 2.4.23-29.54.1, 2.4.33-3.30.1, 2.4.33-lp151.8.12.1
httpd
0:2.4.6-95.el7, 2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.43-1.amzn2, 2.4.43-1.ph1, 2.4.43-1.ph2, 2.4.43-1.ph3, 2.4.6-95.0.1.el7
httpd-devel
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.43-1.amzn2, 2.4.6-95.0.1.el7
httpd-filesystem
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.43-1.amzn2
httpd-manual
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.43-1.amzn2, 2.4.6-95.0.1.el7
httpd-tools
2.4.37-30.0.1.module+el8.3.0+7816+49791cfd, 2.4.43-1.amzn2, 2.4.6-95.0.1.el7
httpd:2.4
8030020200818000036.30b713e6
httpd24
2.4.43-1.89.amzn1
httpd24-devel
2.4.43-1.89.amzn1
httpd24-manual
2.4.43-1.89.amzn1
httpd24-tools
2.4.43-1.89.amzn1
jbcs-httpd24-curl
0:7.64.1-36.jbcs.el6, 0:7.64.1-36.jbcs.el7
jbcs-httpd24-httpd
0:2.4.37-57.jbcs.el6, 0:2.4.37-57.jbcs.el7
jbcs-httpd24-mod_cluster-native
0:1.3.14-4.Final_redhat_2.jbcs.el6, 0:1.3.14-4.Final_redhat_2.jbcs.el7
jbcs-httpd24-mod_http2
0:1.15.7-3.jbcs.el6, 0:1.15.7-3.jbcs.el7
jbcs-httpd24-mod_jk
0:1.2.48-4.redhat_1.jbcs.el6, 0:1.2.48-4.redhat_1.jbcs.el7
Timeline
Publicly disclosed
Apr 1, 2020
Last updated
Sep 8, 2026
Weakness Type
- CWE-456 Missing Initialization of a Variable
- CWE-908 Use of Uninitialized Resource
References
- advisoryopenSUSE-SU-2020:0597
- advisoryRHSA-2020:2644
- advisoryRHSA-2020:2646
- advisoryRHSA-2020:3958
- advisoryRHSA-2020:4751
FAQ
Common Questions.
In Apache HTTP Server 2.4.0 to 2.4.41, mod_proxy_ftp may use uninitialized memory when proxying to a malicious FTP server.
Affected: HTTP Server (Apache) versions >= 2.4.0 to 2.4.41; Communications Element Manager (Oracle) versions 8.1.1, 8.2.0, 8.2.1; 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 not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
Fixed versions are available, including apache 2.4.42, apache 2.4.43-1, HTTP Server <=2.4.41.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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