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CVE-2024-2757

HIGHCVSS 7.5/10EPSS 1.92%

Last modified

CVE-2024-2757 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.. EPSS estimates a 1.92% chance of exploitation in the next 30 days.

Description

In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.92%

77.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
PhpPhp>= 8.3.0, < 8.3.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2024-2757?
In PHP 8.3.* before 8.3.5, function mb_encode_mimeheader() runs endlessly for some inputs that contain long strings of non-space characters followed by a space. This could lead to a potential DoS attack if a hostile user sends data to an application that uses this function.
How severe is CVE-2024-2757?
CVE-2024-2757 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.92% probability of exploitation in the next 30 days.
How do I fix CVE-2024-2757?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST