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Public proof of conceptFix available

CVE-2023-3824

A public proof of concept exists; no exploitation attested.

  • Published2023-08-11
  • Fixed in8.2.9 · 8.1.22 · 8.0.30
  • WeaknessCWE-119

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In PHP version 8.0.* before 8.0.30,  8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE.

Timeline

dates in UTC
  1. 2023-08-1106:15CVE publishedNVD

Versions per branch

NVD · OSV
PHP
BranchAffectedFixed in
8.2≥ 8.2.0, < 8.2.98.2.9
8.1≥ 8.1.0, < 8.1.228.1.22
8.0≥ 8.0.0, < 8.0.308.0.30
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Fedoraproject fedora
BranchAffectedFixed in
38.x= 38no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libzipRocky Linux:8all versions · fixed in 0:1.7.3-1.module+el8.6.0+790+fc63e43f
  • libzipRocky Linux:8all versions · fixed in 0:1.6.1-1.module+el8.10.0+1604+6558efc7
  • libzipRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.7.3-1.module+el8.6.0+13671+84712317and 5 other packages
  • libzipRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.6.1-1.module+el8.10.0+22485+a3539972and 5 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.10.0+3935+28808425and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+2750+78feabcband 1 other package
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+3239+bedf0508and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.7.3-1.module_el8.6.0+2739+efabdb8fand 2 other packages

120 more package ranges on OSV.dev

Vendor advisories

  • CVE-2023-3824 Red Hat Product Security1,045 products fixed · 30 known affected

    php: phar Buffer mismanagement

    rh-php73-php as a component of Red Hat Software Collections · rh-php73-php-bcmath as a component of Red Hat Software Collections · rh-php73-php-cli as a component of Red Hat Software Collections · +27 more

  • RHSA-2024:10952 Red Hat Product Security301 products fixed

    Red Hat Security Advisory: php:7.4 security update

  • RHSA-2024:0387 Red Hat Product Security258 products fixed

    Red Hat Security Advisory: php:8.1 security update

  • RHSA-2023:5927 Red Hat Product Security285 products fixed

    Red Hat Security Advisory: php:8.0 security update

  • RHSA-2023:5926 Red Hat Product Security201 products fixed

    Red Hat Security Advisory: php security update

Full record on NVD

Fix

  1. Update PHP to 8.2.9 · 8.1.22 · 8.0.30
  2. Vendor fix Red Hat Product Security RHSA-2024:10952 · 301 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
  3. Vendor fix Red Hat Product Security RHSA-2024:0387 · 258 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the httpd daemon must be restarted for the update to take effect.
  4. No fix planned, says the vendor Red Hat Product Security CVE-2023-3824 · 30 productsWill not fix

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.19.4known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • CNAweakness (CWE)CWE-119known since 2026-10-23
  • NVDweakness (CWE)CWE-119read 2026-10-23
  • FIRST EPSSEPSS score21.8 %read 2026-11-04
  • PoC-in-GitHubproof of concept3known since 2026-11-01
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2023-08-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jqcx-ccgc-xwhv

Frequently asked questions

What is CVE-2023-3824?

In PHP version 8.0.* before 8.0.30,  8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE.

Is CVE-2023-3824 actively exploited?

Active exploitation of CVE-2023-3824 has not been confirmed. Its EPSS score was 21.8% on 2026-11-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-3824?

CVE-2023-3824 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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