NVD / CVE Program· CNA apache

CVE-2020-11984: Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE

Noroxi assessment

Priority: This week (action score 66/100)

A ready-made attack module is public (Nuclei); exploiting it takes no special expertise.
Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
Probability of exploitation in the next 30 days: 90% (FIRST EPSS); higher than 99.7% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
Fixed version: mod_http2 (AlmaLinux:8) 1.15.7-3.module_el8.5.0+2609+b30d9eec; mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.5.0+2609+b30d9eec, 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa; apache2 (Alpine:v3.10) 2.4.46-r0.
Mentioned 3 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Upgrade to mod_http2 (AlmaLinux:8) 1.15.7-3.module_el8.5.0+2609+b30d9eec; mod_md (AlmaLinux:8) 1:2.0.8-8.module_el8.5.0+2609+b30d9eec, 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa; apache2 (Alpine:v3.10) 2.4.46-r0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

CriticalCVSS 9.8 · v3.1—Proof of concept Fix available

Published: Aug 7, 2020
Updated: Jun 16, 2026
EPSS: 90.0% · 99th percentile
CWE: CWE-120

Report tools

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Action score

This week

Don’t wait for the next maintenance window.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 27 / 30 · 90.0%

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Not in KEV: no record of exploitation in the wild
Proof of concept exists, no weaponized module
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
apache	http server	cpe:2.3:a:apache:http_server
netapp	clustered data ontap	cpe:2.3:a:netapp:clustered_data_ontap
canonical	ubuntu linux	cpe:2.3:o:canonical:ubuntu_linux
debian	debian linux	cpe:2.3:o:debian:debian_linux
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora
opensuse	leap	cpe:2.3:o:opensuse:leap
oracle	communications element manager	cpe:2.3:a:oracle:communications_element_manager
oracle	communications session report manager	cpe:2.3:a:oracle:communications_session_report_manager
oracle	communications session route manager	cpe:2.3:a:oracle:communications_session_route_manager
oracle	enterprise manager ops center	cpe:2.3:a:oracle:enterprise_manager_ops_center
oracle	hyperion infrastructure technology	cpe:2.3:a:oracle:hyperion_infrastructure_technology
oracle	instantis enterprisetrack	cpe:2.3:a:oracle:instantis_enterprisetrack

and 1 more

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

apache http server2.4.32 and later · up to 2.4.43 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (apache). Independent of NVD's CPE analysis and usually ahead of it.

n/a Apache HTTP Server
- 2.4.32 to 2.4.44affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

+96

Same product

apache: all records

Other highest-scoring records for the same primary product.

CVE-2021-42013Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773)KEV
99Now
CVE-2021-41773Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49KEV
99Now
CVE-2024-38475Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.KEV
96Now

Published before and after this one in the same product

← EarlierCVE-2020-1934Apr 1, 2020 · 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.
37Monitor
← EarlierCVE-2020-1927Apr 1, 2020 · In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by en
41Plan
Later →CVE-2020-11985Aug 7, 2020 · IP address spoofing when proxying using mod_remoteip and mod_rewrite For configurations using proxying with mod_remoteip and certain mod_rew
23Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
almalinux:mod_http2	1.15.7-3.module_el8.5.0+2609+b30d9eec · AlmaLinux:8	Package registry (OSV)
almalinux:mod_md	1:2.0.8-8.module_el8.5.0+2609+b30d9eec · AlmaLinux:8	Package registry (OSV)
alpine:apache2	2.4.46-r0 · Alpine:v3.10	Package registry (OSV)
debian:apache2	2.4.46-1 · Debian:12	Package registry (OSV)
debian:uwsgi	2.0.14+20161117-3+deb9u3 · Debian:9	Package registry (OSV)
opensuse:apache2	2.4.43-lp152.2.3.1 · openSUSE:Leap 15.2	Package registry (OSV)
red hat:httpd24-httpd	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-httpd-debuginfo	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-httpd-devel	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-httpd-manual	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-httpd-tools	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_ldap	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_proxy_html	1:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_session	0:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:httpd24-mod_ssl	1:2.4.34-22.el7 · Red Hat:rhel_software_collections:3::el7	Package registry (OSV)
red hat:jbcs-httpd24-apr	0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-debuginfo	0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
red hat:jbcs-httpd24-apr-devel	0:1.6.3-104.jbcs.el6 · Red Hat:jboss_core_services:1::el6	Package registry (OSV)
rocky linux:httpd	0:2.4.37-39.module+el8.4.0+571+fd70afb1 · Rocky Linux:8	Package registry (OSV)
rocky linux:mod_http2	0:1.15.7-3.module+el8.4.0+553+7a69454b · Rocky Linux:8	Package registry (OSV)
rocky linux:mod_md	1:2.0.8-8.module+el8.5.0+695+1fa8055e · Rocky Linux:8	Package registry (OSV)
suse:apache2	2.4.43-3.5.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP2	Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

Nuclei detection template ×1
Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Nuclei detection template	Nuclei template CVE-2020-11984	—
Proof-of-concept repository on GitHub	stars:0	2025-06-30

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedAug 7, 2020
First PoCJun 30, 2025+1787 d
TodayNov 7, 2026+2283 d

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-20-1010 · Dec 4, 2020(Apache httpd 2 Sunucu Güvenlik Güncellemesi)
TR-20-644 · Aug 26, 2020(Apache Web Sunucu Sunucu Zafiyeti)
TR-20-583 · Aug 10, 2020(Apache httpd 2 Sunucu Güvenlik Güncellemesi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-120 · Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

The bug in code

The whole CWE-120 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1char buf[256];
2memcpy(buf, pkt->data, pkt->len);

Fixed

1char buf[256];
2if (pkt->len > sizeof(buf)) {
3  return -EINVAL;
4}
5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

For records you follow, these changes also arrive as notifications. →

References

lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records