PT-2021-22235 · Wolfssl+1 · Wolfssl+1

Published 2021-07-26 · Updated 2021-08-23 · CVE-2021-38597

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions wolfSSL versions prior to 4.8.1

Description The issue arises when wolfSSL incorrectly skips OCSP verification in certain situations where the response data contains the NoCheck extension, despite the data being irrelevant. This can lead to potential security risks. The estimated number of potentially affected devices worldwide is not specified. There is no information provided about real-world incidents where this issue was exploited.

Recommendations For versions prior to 4.8.1, update to version 4.8.1 or later to resolve the issue. As a temporary workaround, consider disabling OCSP verification until a patch is available. Restrict access to sensitive data to minimize the risk of exploitation. Avoid using the NoCheck extension in OCSP responses until the issue is resolved.

Fix

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-345

Related Identifiers

ALT-PU-2021-2325

ALT-PU-2021-2384

CVE-2021-38597

Affected Products

Alt Linux

Wolfssl

References · 11

• https://github.com/wolfSSL/wolfssl/commit/f93083be72a3b3d956b52a7ec13f307a27b6e093 · Patch
• https://security-tracker.debian.org/tracker/CVE-2021-38597 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-38597 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-38597 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-38597 · Security Note
• https://osv.dev/vulnerability/CVE-2021-38597 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-38597 · Security Note
• https://wolfssl.com/docs/wolfssl-changelog · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-38597 · Vendor Advisory
• https://t.me/cvenotify/19220 · Telegram Post
• https://t.me/cibsecurity/27233 · Telegram Post