PT-2021-11957 · Wolfssl+1 · Wolfssl+1

Sparkidev · Published 2021-01-06 · Updated 2021-02-03 · CVE-2020-36177

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: wolfSSL versions prior to 4.6.0

Description: The issue is related to the RsaPad PSS function in the wolfcrypt/src/rsa.c file, which has an out-of-bounds write for certain relationships between key size and digest size.

Recommendations: For versions prior to 4.6.0, update to version 4.6.0 or later to resolve the issue. As a temporary workaround, consider restricting the use of the RsaPad PSS function until a patch is available.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2021-1202

CVE-2020-36177

Affected Products

Alt Linux

Wolfssl

References · 14

• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26567 · Exploit
• https://github.com/wolfSSL/wolfssl/commit/63bf5dc56ccbfc12a73b06327361687091a4c6f7 · Patch
• https://github.com/wolfSSL/wolfssl/commit/fb2288c46dd4c864b78f00a47a364b96a09a5c0f · Patch
• https://github.com/wolfSSL/wolfssl/pull/3426 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2020-36177 · Security Note
• https://cve.org/CVERecord?id=CVE-2020-36177 · Security Note
• https://osv.dev/vulnerability/CVE-2020-36177 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-36177 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-36177 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-36177 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-36177 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl/releases/tag/v4.6.0-stable · Note
• https://t.me/cvenotify/8226 · Telegram Post
• https://t.me/cibsecurity/21673 · Telegram Post