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NVD / CVE Program· CNA apache

CVE-2019-0217: In Apache HTTP Server 2.4 release 2.4.38 and prior, a race condition in mod_auth_digest when running in a threaded server could allow a user

Noroxi assessment

Priority: Monitor (action score 35/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 16.3% (FIRST EPSS); higher than 96.9% of all records.
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3; apache2 (Debian:8) 2.4.10-10+deb8u14.

Low priority for now. Upgrade to apache2 (Alpine:v3.10) 2.4.39-r0; apache2 (Debian:12) 2.4.38-3; apache2 (Debian:8) 2.4.10-10+deb8u14 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

In Apache HTTP Server 2.4 release 2.4.38 and prior, a race condition in mod_auth_digest when running in a threaded server could allow a user with valid credentials to authenticate using another username, bypassing configured access control restrictions.

HighCVSS 7.5 · v3.1—Proof of concept Fix available
Published
Apr 8, 2019
Updated
Jun 16, 2026
EPSS
16.3% · 96th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
5 / 30 · 16.3%

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Noroxi analysis

What does it mean in your environment?

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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.

VendorProduct
apachehttp server
debiandebian linux
fedoraprojectfedora
canonicalubuntu linux
redhatenterprise linux
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux workstation
opensuseleap
netapponcommand unified manager
netappclustered data ontap
oracleenterprise manager ops center

and 2 more

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When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or gets exploit code

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  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
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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 server2.4.0 and later · up to 2.4.38 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.

  • Apache Apache HTTP Server

    • 2.4.0 to 2.4.38affected

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.10apache2before 2.4.39-r02.4.39-r0
Debian:12apache2before 2.4.38-32.4.38-3
Debian:8apache2before 2.4.10-10+deb8u142.4.10-10+deb8u14
Debian:9apache2before 2.4.25-3+deb9u72.4.25-3+deb9u7
openSUSE:Leap 15.0apache2before 2.4.33-lp150.2.17.12.4.33-lp150.2.17.1
Red Hat:enterprise_linux:7::clienthttpdbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clienthttpd-debuginfobefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clienthttpd-develbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clienthttpd-manualbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clienthttpd-toolsbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clientmod_ldapbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clientmod_proxy_htmlbefore 1:2.4.6-90.el71:2.4.6-90.el7
Red Hat:enterprise_linux:7::clientmod_sessionbefore 0:2.4.6-90.el70:2.4.6-90.el7
Red Hat:enterprise_linux:7::clientmod_sslbefore 1:2.4.6-90.el71:2.4.6-90.el7
Red Hat:enterprise_linux:8::appstreamhttpdbefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-debuginfobefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-debugsourcebefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-develbefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-filesystembefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-manualbefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-toolsbefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreamhttpd-tools-debuginfobefore 0:2.4.37-16.module+el8.1.0+4134+e6bad0ed0:2.4.37-16.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreammod_http2before 0:1.11.3-3.module+el8.1.0+4134+e6bad0ed0:1.11.3-3.module+el8.1.0+4134+e6bad0ed
Red Hat:enterprise_linux:8::appstreammod_http2-debuginfobefore 0:1.11.3-3.module+el8.1.0+4134+e6bad0ed0:1.11.3-3.module+el8.1.0+4134+e6bad0ed

+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-2019-0190Jan 30, 2019 · A bug exists in the way mod_ssl handled client renegotiations.
    48Plan
  • ← EarlierCVE-2019-0215Apr 8, 2019 · In Apache HTTP Server 2.4 releases 2.4.37 and 2.4.38, a bug in mod_ssl when using per-location client certificate verification with TLSv1.3
    33Monitor
  • Later →CVE-2019-0211Apr 8, 2019 · In Apache HTTP Server 2.4 releases 2.4.17 to 2.4.38, with MPM event, worker or prefork, code executing in less-privileged child processes orKEV
    81Now

Remediation

Which version to upgrade to

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

Product / packageFixed versionSource
alpine:apache22.4.39-r0 · Alpine:v3.10Package registry (OSV)
debian:apache22.4.38-3 · Debian:12Package registry (OSV)
opensuse:apache22.4.33-lp150.2.17.1 · openSUSE:Leap 15.0Package registry (OSV)
red hat:httpd0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:httpd-debuginfo0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:httpd-debugsource0:2.4.37-16.module+el8.1.0+4134+e6bad0ed · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:httpd-devel0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:httpd-filesystem0:2.4.37-16.module+el8.1.0+4134+e6bad0ed · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:httpd-manual0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:httpd-tools0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:httpd-tools-debuginfo0:2.4.37-16.module+el8.1.0+4134+e6bad0ed · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:mod_ldap0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:mod_proxy_html1:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:mod_session0:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
red hat:mod_ssl1:2.4.6-90.el7 · Red Hat:enterprise_linux:7::clientPackage registry (OSV)
suse:apache22.4.33-3.15.1 · SUSE:Linux Enterprise Module for Server Applications 15Package 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

  • 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
SourceKindDate
Proof-of-concept repository on GitHubstars:02024-10-06

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.

  1. Published
  2. First PoC+2007 d
  3. TodayNov 7, 2026+2770 d
EPSS, last 120 days-1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

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
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSS vector

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

nvd-primary

Attack context

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

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (19 more)

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

All records