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NVD / CVE Program· CNA apache

CVE-2024-38477: Apache HTTP Server: Crash resulting in Denial of Service in mod_proxy via a malicious request

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 3.1% (FIRST EPSS); higher than 87.9% 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: Apache Software Foundation Apache HTTP Server 2.4.60.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Apache Software Foundation Apache HTTP Server 2.4.60 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

null pointer dereference in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows an attacker to crash the server via a malicious request. Users are recommended to upgrade to version 2.4.60, which fixes this issue.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Jul 1, 2024
Updated
Jun 17, 2026
EPSS
3.1% · 87th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-38477

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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
netappclustered data ontap

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Watch new CVEs for http server

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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Is Apache HTTP Server on your server exposed to the internet?

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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 · before 2.4.60

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 Software Foundation Apache HTTP Server

    • 2.4.0 and later · up to and including 2.4.59affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8httpdbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-develbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-filesystembefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-manualbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8httpd-toolsbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_http2before 1.15.7-10.module_el8.10.0+3832+564e76531.15.7-10.module_el8.10.0+3832+564e7653
AlmaLinux:8mod_ldapbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_mdbefore 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
AlmaLinux:8mod_mdbefore 1:2.0.8-8.module_el8.6.0+3031+fb177b091:2.0.8-8.module_el8.6.0+3031+fb177b09
AlmaLinux:8mod_proxy_htmlbefore 1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.11:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_sessionbefore 2.4.37-65.module_el8.10.0+3872+9b8ab21e.12.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:8mod_sslbefore 1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.11:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1
AlmaLinux:9httpdbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-corebefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-develbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-filesystembefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-manualbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9httpd-toolsbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_ldapbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_luabefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_proxy_htmlbefore 1:2.4.57-11.el9_41:2.4.57-11.el9_4
AlmaLinux:9mod_sessionbefore 2.4.57-11.el9_42.4.57-11.el9_4
AlmaLinux:9mod_sslbefore 1:2.4.57-11.el9_41:2.4.57-11.el9_4
Alpine:v3.17apache2before 2.4.60-r02.4.60-r0

+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-2024-38474Jul 1, 2024 · Apache HTTP Server weakness with encoded question marks in backreferences
    40Plan
  • ← EarlierCVE-2024-38476Jul 1, 2024 · Apache HTTP Server may use exploitable/malicious backend application output to run local handlers via internal redirect
    51Plan
  • Later →CVE-2024-39573Jul 1, 2024 · Apache HTTP Server: mod_rewrite proxy handler substitution
    41Plan

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
Apache Software Foundation Apache HTTP Server2.4.60 · descriptionVendor (CNA)
almalinux:httpd2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-core2.4.57-11.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:httpd-devel2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-filesystem2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-manual2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:httpd-tools2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_http21.15.7-10.module_el8.10.0+3832+564e7653 · AlmaLinux:8Package registry (OSV)
almalinux:mod_ldap2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_md1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa · AlmaLinux:8Package registry (OSV)
almalinux:mod_proxy_html1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_session2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
almalinux:mod_ssl1:2.4.37-65.module_el8.10.0+3872+9b8ab21e.1 · AlmaLinux:8Package registry (OSV)
alpine:apache22.4.60-r0 · Alpine:v3.17Package registry (OSV)
debian:apache22.4.61-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:apache22.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-devel2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-event2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-manual2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-prefork2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-utils2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
opensuse:apache2-worker2.4.58-150600.5.11.1 · openSUSE:Leap 15.6Package registry (OSV)
red hat:httpd0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-debuginfo0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-debugsource0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-devel0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-filesystem0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-manual0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-tools0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)
red hat:httpd-tools-debuginfo0:2.4.37-56.module+el8.8.0+22079+e03f6970.8 · Red Hat:rhel_eus:8.8::appstreamPackage registry (OSV)

+14

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

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.

No dated events beyond publication.

EPSS, last 120 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.

Variant candidates

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

  • CVE-2024-363870 days apartApache HTTP Server: DoS by Null pointer in websocket over HTTP/2
    22Monitor

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.

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
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records