CVE-2023-49316
CVE-2023-49316 is a high-severity vulnerability in Phpseclib with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-834.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- EPSS exploit prediction: 1% (51st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-834
- Affected product: Phpseclib
- Published:
- Last modified:
Description
In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.
Frequently asked questions
- What is CVE-2023-49316?
- In Math/BinaryField.php in phpseclib 3 before 3.0.34, excessively large degrees can lead to a denial of service.
- How severe is CVE-2023-49316?
- CVE-2023-49316 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2023-49316 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2023-49316?
- CVE-2023-49316 affects Phpseclib. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2023-49316?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2023-49316 published?
- CVE-2023-49316 was published on 2023-11-27 and last updated on 2026-06-17.
References
- https://github.com/phpseclib/phpseclib/commit/964d78101a70305df33f442f5490f0adb3b7e77f
- https://github.com/phpseclib/phpseclib/releases/tag/3.0.34
Affected products (1)
- cpe:2.3:a:phpseclib:phpseclib:*:*:*:*:*:*:*:*
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