Critical severity · published Jan 6, 2021
CVE-2020-36177
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
9.8
CVSS
3.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.6% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WO
Wolfssl · Wolfssl
before 4.6.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-36177
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-36177
Exploit
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26567
Patch
https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc12a73b06327361687091a4c6f7
Patch
https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f
Patch
https://github.com/wolfSSL/wolfssl/pull/3426
Third Party Advisory
https://github.com/wolfSSL/wolfssl/releases/tag/v4.6.0-stable
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