PT-2020-13122 · Wolfssl · Wolfssl

Lenny Wang · Published 2020-08-21 · Updated 2021-07-21 · CVE-2020-12457

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions wolfSSL versions prior to 4.5.0

Description An issue in the TLS 1.3 change cipher spec (CCS) message processing logic can cause a denial of service. If an attacker sends ChangeCipherSpec messages in a specific way, involving more than one in a row, the server becomes stuck in the ProcessReply() loop.

Recommendations For versions prior to 4.5.0, update to version 4.5.0 or later to resolve the issue. As a temporary workaround, consider restricting or disabling TLS 1.3 support until a patch is available.

Fix

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

CVE-2020-12457

Affected Products

Wolfssl

References · 9

• https://github.com/wolfSSL/wolfssl/pull/2927 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-12457 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-12457 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-12457 · Security Note
• https://ubuntu.com/security/CVE-2020-12457 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-12457 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-12457 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2020-12457 · Vendor Advisory
• https://github.com/wolfSSL/wolfssl/releases/tag/v4.5.0-stable · Note