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Fencer Vulns
critical 9.8

CVE-2020-11984 in the critical feed json

Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE

published 2020-08-07 6 y ago modified 2026-09-08 2 mo ago also BIT-apache-2020-11984 , EUVD-2020-4307

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
90.0%
EPSS 90.0% chance of exploitation in 30 days, percentile 99.7%
public exploits
0
none known, plus a Nuclei check

Summary

Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE

Patch / fix

  • bitnami apache 2.4.44
  • apache2 Debian 14, Debian 13, Debian 12 2.4.46-1

debian advisories DEBIAN-CVE-2020-11984

  • uwsgi Ubuntu 18.04 LTS 2.0.15-10.2ubuntu2.2
  • apache2 Ubuntu 20.04 LTS 2.4.41-4ubuntu3.1
  • uwsgi Ubuntu Pro 14.04 LTS 1.9.17.1-5ubuntu0.1+esm1
  • uwsgi Ubuntu Pro 16.04 LTS 2.0.12-5ubuntu3.2+esm1

ubuntu advisories UBUNTU-CVE-2020-11984

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • httpd RHEL 8 2.4.37-39.module+el8.4.0+9658+b87b2deb
  • mod_md RHEL 8 1:2.0.8-8.module+el8.3.0+6814+67d1e611
  • mod_ssl RHEL 8 1:2.4.37-39.module+el8.4.0+9658+b87b2deb
  • mod_ldap RHEL 8 2.4.37-39.module+el8.4.0+9658+b87b2deb
  • mod_http2 RHEL 8 1.15.7-3.module+el8.4.0+8625+d397f3da
  • httpd-tools RHEL 8 2.4.37-39.module+el8.4.0+9658+b87b2deb
  • mod_session RHEL 8 2.4.37-39.module+el8.4.0+9658+b87b2deb
  • httpd-manual RHEL 8 2.4.37-39.module+el8.4.0+9658+b87b2deb

red hat advisories RHSA-2021:1809RHSA-2020:4384RHBA-2020:5280

  • apache2 SLES for SAP 15, SLES 15-LTSS, SLE Module for Server Applications 15 SP1 +2 more 2.4.33-3.33.1
  • apache2 SLE Module for Server Applications 15 SP2, SLE Module for Basesystem 15 SP2 2.4.43-3.5.1

suse advisories SUSE-SU-2020:2344-1SUSE-SU-2020:2311-1

  • apache2 openSUSE Leap 15.1 2.4.33-lp151.8.15.1
  • apache2 openSUSE Leap 15.2 2.4.43-lp152.2.3.1

opensuse advisories openSUSE-SU-2020:1293-1openSUSE-SU-2020:1285-1

  • mod_md AlmaLinux 8 1:2.0.8-8.module_el8.5.0+2609+b30d9eec
  • mod_md AlmaLinux 8 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
  • mod_http2 AlmaLinux 8 1.15.7-3.module_el8.5.0+2609+b30d9eec

almalinux advisories ALSA-2021:1809

  • httpd Rocky Linux 8 2.4.37-39.module+el8.4.0+571+fd70afb1
  • mod_md Rocky Linux 8 1:2.0.8-8.module+el8.5.0+695+1fa8055e
  • mod_md Rocky Linux 8 1:2.0.8-8.module+el8.4.0+553+7a69454b
  • mod_http2 Rocky Linux 8 1.15.7-3.module+el8.4.0+553+7a69454b
  • mod_http2 Rocky Linux 8 1.15.7-3.module+el8.5.0+695+1fa8055e

rocky linux advisories RLSA-2021:1809

  • apache2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +13 more 2.4.46-r0

alpine advisories ALPINE-CVE-2020-11984

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-11984 updated cvss 9.8

httpd: mod_proxy_uwsgi buffer overflow

  • Red Hat JBoss Enterprise Web Server 2 jbcs-httpd24, jbcs-httpd24-runtime
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) mod_md 2.0.8-8.module+el8.3.0+6814+67d1e611, httpd 2.4.37-39.module+el8.4.0+9658+b87b2deb, mod_ssl 2.4.37-39.module+el8.4.0+9658+b87b2deb, mod_http2 1.15.7-3.module+el8.4.0+8625+d397f3da, mod_ldap 2.4.37-39.module+el8.4.0+9658+b87b2deb, httpd-tools 2.4.37-39.module+el8.4.0+9658+b87b2deb, +4 more
    fixed: vendor fix RHSA-2021:1809
  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2020:4383
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el6, jbcs-httpd24-curl 7.64.1-44.jbcs.el6, jbcs-httpd24-brotli 1.0.6-38.jbcs.el6, jbcs-httpd24-httpd 2.4.37-64.jbcs.el6, jbcs-httpd24-jansson 2.11-53.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el6, +26 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el7, jbcs-httpd24-curl 7.64.1-44.jbcs.el7, jbcs-httpd24-brotli 1.0.6-38.jbcs.el7, jbcs-httpd24-httpd 2.4.37-64.jbcs.el7, jbcs-httpd24-jansson 2.11-53.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el7, +27 more
    fixed: vendor fix RHSA-2020:4384
  • Red Hat Software Collections for Red Hat Enterprise Linux Server (v. 7) httpd24-httpd 2.4.34-22.el7, httpd24-mod_ssl 2.4.34-22.el7, httpd24-mod_ldap 2.4.34-22.el7, httpd24-httpd-tools 2.4.34-22.el7, httpd24-mod_session 2.4.34-22.el7, httpd24-httpd-manual 2.4.34-22.el7, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.6) httpd24-httpd 2.4.34-22.el7, httpd24-mod_ssl 2.4.34-22.el7, httpd24-mod_ldap 2.4.34-22.el7, httpd24-httpd-tools 2.4.34-22.el7, httpd24-mod_session 2.4.34-22.el7, httpd24-httpd-manual 2.4.34-22.el7, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Server EUS (v. 7.7) httpd24-httpd 2.4.34-22.el7, httpd24-mod_ssl 2.4.34-22.el7, httpd24-mod_ldap 2.4.34-22.el7, httpd24-httpd-tools 2.4.34-22.el7, httpd24-mod_session 2.4.34-22.el7, httpd24-httpd-manual 2.4.34-22.el7, +1 more Red Hat Software Collections for Red Hat Enterprise Linux Workstation (v. 7) httpd24-httpd 2.4.34-22.el7, httpd24-mod_ssl 2.4.34-22.el7, httpd24-mod_ldap 2.4.34-22.el7, httpd24-httpd-tools 2.4.34-22.el7, httpd24-mod_session 2.4.34-22.el7, httpd24-httpd-manual 2.4.34-22.el7, +1 more
    fixed: vendor fix RHBA-2020:5280
  • Red Hat Enterprise Linux 5 httpd Red Hat Enterprise Linux 6 httpd, mod_ssl, httpd-tools, httpd-manual Red Hat Enterprise Linux 7 httpd, mod_ssl, mod_ldap, httpd-tools, mod_session, httpd-manual, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

90.04% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • Nuclei template Apache HTTP Server - Remote Code Execution nuclei detection template
  • packetstormsecurity.com http://packetstormsecurity.com/files/159009/Apache2-mod_proxy_uwsgi-Incorrect-Request-Handling.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
OSV 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
bitnami apache
>=2.4.32, <2.4.44
2.4.44

Affected products

  • n/a Apache HTTP Server

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.