Resource exhaustion in Phpseclib
CVE-2024-27354
An issue was discovered in phpseclib 1.x before 1.0.23, 2.x before 2.0.47, and 3.x before 3.0.36. An attacker can construct a malformed certificate containing an extremely large prime to cause a denial of service (CPU consumption for an isPrime primality check). NOTE: this issue was introduced when attempting to fix CVE-2023-27560.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Phpseclib
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/phpseclib/phpseclib/blob/master/phpseclib/Math/PrimeField.php (Product)
- gist.github.com/katzj/ee72f3c2a00590812b2ea3c0c8890e0b (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2024/03/msg00002.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2024/03/msg00003.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2024-27354?
- CVE-2024-27354 is a high-severity vulnerability in Phpseclib, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2024-03-01.
- How severe is CVE-2024-27354?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2024-27354 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.