Vulnerability · Published Jul 21, 2021 · Assigned by mitre
CVE-2021-37155
Critical 9.8
In plain English
A critical-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 1.5% (higher than 74% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)1.5%top 25.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
wolfSSL 4.6.x through 4.7.x before 4.8.0 does not produce a failure outcome when the serial number in an OCSP request differs from the serial number in the OCSP response.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wolfssl | 5.0.0-1 | DEBIAN-CVE-2021-37155 |
| Debian:13 | wolfssl | 5.0.0-1 | DEBIAN-CVE-2021-37155 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-37155 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-37155 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2021-37155 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2021-37155 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2021-37155 |
Affected products (as reported)
References
- https://github.com/wolfSSL/wolfssl/pull/3990 x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/releases/tag/v4.8.0-stable x_refsource_MISC