Vulnerability · Published Jan 6, 2021 · Assigned by mitre
CVE-2020-36177
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 3.6% (higher than 89% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)3.6%top 10.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
RsaPad_PSS in wolfcrypt/src/rsa.c in wolfSSL before 4.6.0 has an out-of-bounds write for certain relationships between key size and digest size.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | wolfssl | 4.6.0-1 | DEBIAN-CVE-2020-36177 |
| Debian:13 | wolfssl | 4.6.0-1 | DEBIAN-CVE-2020-36177 |
| Ubuntu:22.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2020-36177 |
| Ubuntu:24.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2020-36177 |
| Ubuntu:25.10 | wolfssl | no fix listed | UBUNTU-CVE-2020-36177 |
| Ubuntu:26.04:LTS | wolfssl | no fix listed | UBUNTU-CVE-2020-36177 |
| Ubuntu:26.10 | wolfssl | no fix listed | UBUNTU-CVE-2020-36177 |
Affected products (as reported)
References
- https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc12a73b06327361687091a4c6f7 x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/pull/3426 x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f x_refsource_MISC
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26567 x_refsource_MISC
- https://github.com/wolfSSL/wolfssl/releases/tag/v4.6.0-stable x_refsource_MISC