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CVE-2024-2757

PHP denial of service

7.5 HIGHPublic exploitEPSS 1.92%
  1. Published29 Apr 2024

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

PHP≥ 8.3.0 < 8.3.5

Remediation

Fixed in
PHP≥ 8.3.5

References

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Frequently asked

Is CVE-2024-2757 being actively exploited?

CVE-2024-2757 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 1.92%.

How severe is CVE-2024-2757?

CVE-2024-2757 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 1.92% probability of exploitation.

Which products are affected by CVE-2024-2757?

Affected products include PHP.

How do I fix CVE-2024-2757?

Upgrade affected software to a fixed version, for example PHP 8.3.5 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-2757 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.