CVE-2023-3824: Buffer overflow and overread in phar_dir_read()
Vulnerability summary
CVE-2023-3824 is a critical (CVSS 9.8) vulnerability in debian debian_linux. EPSS estimates a 21.79% chance of exploitation in the next 30 days, higher than 97.6% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (GitHub, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 14 · Related 6Timeline
- 11-08-2023PublishedVulnerability first disclosed.
- 13-02-2025Last modifiedVulnerability information updated.
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.
CVSS metrics
5 scores · 5 sources · 1 version- CVE.orgCNA9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
21.79%
Chance of exploitation in the next 30 days
Percentile
98%
Versus all other CVEs
30-day change
No change 0.00 pp
From 21.79% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundPhp Src
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu5 products
- php5All versions (No fix recorded)
- php7.0< 7.0.33-0ubuntu0.16.04.16+esm8
- php7.2< 7.2.24-0ubuntu0.18.04.17+esm2
- php7.4< 7.4.3-4ubuntu2.20
- php8.1< 8.1.2-1ubuntu2.14
Alpine2 products
- php8< 8.0.30-r0
- php81< 8.1.22-r0
Debian2 products
- php8.2< 8.2.18-1~deb12u1
- debian_linuxEOL10.0
Fedoraproject1 product
- fedoraEOL38
Opensuse1 product
- php8&distro=openSUSE Tumbleweed< 8.2.9-1.1
Php1 product
- php≥ 8.0.0, < 8.0.30 | ≥ 8.1.0, < 8.1.22 | ≥ 8.2.0, < 8.2.9
Php group1 product
- php≥ 8.0.*, < 8.0.30 | ≥ 8.1.*, < 8.1.22 | ≥ 8.2.*, < 8.2.8
7 vendors · 13 products
References
13 links- lists.fedoraproject.org/archives/…Mailing List
- security.netapp.com/advisory/ntap-20230825-0001/Third Party Advisory
