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CVE-2023-52892

Phpseclib vulnerability

7.5 HIGHPublic exploitEPSS 0.38%
  1. Published27 Jun 2024

Description

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

CVSS 3.1 breakdown

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

Affected products

Phpseclib≥ 1.0.0 < 1.0.22 · ≥ 2.0.0 < 2.0.46 · ≥ 3.0.0 < 3.0.33

Remediation

Fixed in
Phpseclib≥ 1.0.22

References

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Frequently asked

Is CVE-2023-52892 being actively exploited?

CVE-2023-52892 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.38%.

How severe is CVE-2023-52892?

CVE-2023-52892 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 0.38% probability of exploitation.

Which products are affected by CVE-2023-52892?

Affected products include Phpseclib.

How do I fix CVE-2023-52892?

Upgrade affected software to a fixed version, for example Phpseclib 1.0.22 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-52892 against the real software inventory on every managed device, every day. 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.