CVE-2023-3247: Missing error check and insufficient random bytes in HTTP Digest authentication for SOAP
Vulnerability summary
CVE-2023-3247 is a medium (CVSS 4.3) Unchecked Return Value vulnerability in php group php. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 53.5% of scored vulnerabilities.
Not severe (CVSS 2.6, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 1Timeline
- 22-07-2023PublishedVulnerability first disclosed.
- 15-10-2024Last modifiedVulnerability information updated.
Description
In PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication, random value generator was not checked for failure, and was using narrower range of values than it should have. In case of random generator failure, it could lead to a disclosure of 31 bits of uninitialized memory from the client to the server, and it also made easier to a malicious server to guess the client's nonce.
CVSS metrics
5 scores · 5 sources · 1 version- CVE.orgCNA2.6LowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:NDiffers
- OSV · UbuntuEcosystem advisory · calculated2.6LowCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:NDiffers
- OSV · DebianEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- OSV · AlpineEcosystem advisory · calculated4.3MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
EPSS trend
Probability
0.71%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.71% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, low-privilege account, user interaction (CVSS vector). Other conditions: not stated in public data.
Suse25 products
- apache2-mod_php7&distro=SUSE Linux Enterprise Module for Legacy 15 SP4< 7.4.33-150400.4.25.1
- apache2-mod_php7&distro=SUSE Linux Enterprise Module for Legacy 15 SP5< 7.4.33-150400.4.25.1
- apache2-mod_php8&distro=SUSE Linux Enterprise Module for Web and Scripting 15 SP4< 8.0.29-150400.4.34.1
- apache2-mod_php8&distro=SUSE Linux Enterprise Module for Web and Scripting 15 SP5< 8.0.29-150400.4.34.1
- php7-embed&distro=SUSE Linux Enterprise Module for Package Hub 15 SP4< 7.4.33-150400.4.25.1
Opensuse24 products
- apache2-mod_php7&distro=openSUSE Leap 15.4< 7.4.33-150400.4.25.1
- apache2-mod_php7&distro=openSUSE Leap 15.5< 7.4.33-150400.4.25.1
- apache2-mod_php8&distro=openSUSE Leap 15.4< 8.0.29-150400.4.34.1
- apache2-mod_php8&distro=openSUSE Leap 15.5< 8.0.29-150400.4.34.1
- php7-embed&distro=openSUSE Leap 15.4< 7.4.33-150400.4.25.1
Ubuntu5 products
- php5All versions (No fix recorded)
- php7.0< 7.0.33-0ubuntu0.16.04.16+esm7
- php7.2< 7.2.24-0ubuntu0.18.04.17+esm1
- php7.4< 7.4.3-4ubuntu2.19
- php8.1< 8.1.2-1ubuntu2.13
Debian3 products
- php7.3< 7.3.31-1~deb10u4
- php7.4< 7.4.33-1+deb11u4
- php8.2< 8.2.7-1~deb12u1
Alpine2 products
- php8< 8.0.29-r0
- php81< 8.1.22-r0
Mageia1 product
- php< 8.0.29-1.mga8
Php1 product
- php≥ 8.0.0, < 8.0.29 | ≥ 8.1.0, < 8.1.20 | ≥ 8.2.0, < 8.2.7
Php group1 product
- php≥ 8.0.*, < 8.0.29 | ≥ 8.1.*, < 8.1.20 | ≥ 8.2.*, < 8.2.7
8 vendors · 62 products
