Vulnerability in Wolfssl
CVE-2020-15309
An issue was discovered in wolfSSL before 4.5.0, when single precision is not employed. Local attackers can conduct a cache-timing attack against public key operations. These attackers may already have obtained sensitive information if the affected system has been used for private key operations (e.g., signing with a private key).
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (25.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable (Third Party Advisory)
- arxiv.org/abs/2008.12188 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-15309?
- CVE-2020-15309 is a high-severity vulnerability in Wolfssl, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 7.0/10. Published 2020-08-21.
- How severe is CVE-2020-15309?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2020-15309 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.