Vulnerability · Published Aug 12, 2021 · Assigned by mitre
CVE-2021-38597
Medium 5.9
In plain English
A medium-severity security flaw in the wolfssl package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.9Medium
Exploit odds (30 days)0.5%top 58.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
wolfSSL before 4.8.1 incorrectly skips OCSP verification in certain situations of irrelevant response data that contains the NoCheck extension.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wolfssl | 5.0.0-1 | DEBIAN-CVE-2021-38597 |
| Debian:13 | wolfssl | 5.0.0-1 | DEBIAN-CVE-2021-38597 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-38597 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-38597 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2021-38597 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-38597 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2021-38597 |
Affected products (as reported)
References
- https://www.wolfssl.com/docs/wolfssl-changelog/ x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/commit/f93083be72a3b3d956b52a7ec13f307a27b6e093 x_refsource_MISC