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CVE-2023-3247

16
FAUCET Score

CVE-2023-3247 is a medium-severity vulnerability affecting PHP versions 8.0.* before 8.0.29, 8.1.* before 8.1.20, and 8.2.* before 8.2.7 when using SOAP HTTP Digest Authentication. The vulnerability stems from an unchecked and improperly ranged random value generator, which could lead to the disclosure of 31 bits of uninitialized memory from the client to the server. This also makes it easier for a malicious server to guess the client's nonce. With a CVSS score of 4.3, this vulnerability has a low impact on confidentiality and requires low privileges, but it does not affect integrity or availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed on the CISA KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, < 8.0.29CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 8.1.0, < 8.1.20CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 8.2.0, < 8.2.7CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

2.6LOW

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
1.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.73%
Probability of exploitation in next 30 days
EPSS Percentile
50.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0073 is in the 61st percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (8)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18329-16823Fixed in: 8.1.22-1
microsoftpatch availablevia msrc
Product: cbl2 php 8.1.22-1 on CBL Mariner 2.0Fixed in: 8.1.22-1
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: php-0:8.0.30-1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: php:8.1-9030020231221080340.9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:8.0-8080020231006102311.0b4eb31d
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: php:7.4-8100020241113075828.f7998665
View patch
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php73-php

Vendor Advisories (2)

microsoft2023-Jul/CVE-2023-3247Moderate

Missing error check and insufficient random bytes in HTTP Digest authentication for SOAP

Jul 11, 2023
redhatCVE-2023-3247Moderate

php: Missing error check and insufficient random bytes in HTTP Digest authentication for SOAP

Jul 3, 2023

References

github.com / php/php-src/security/advisories/GHSA-76gg-c692-v2mw
PatchVendor Advisory