PT-2021-24239 · Mbed Tls+1 · Mbed Tls+1

Published 2021-12-18 · Updated 2022-12-08 · CVE-2021-45451

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Mbed TLS versions prior to 3.1.0

Description: The issue allows policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application, specifically through the psa aead generate nonce function.

Recommendations: For versions prior to 3.1.0, update to version 3.1.0 or later to resolve the issue. As a temporary workaround, consider restricting access to memory locations that could be accessed by untrusted applications to minimize the risk of exploitation.

Fix

Use of a Broken Cryptographic Algorithm

Weakness Enumeration

CWE-327

Related Identifiers

ALT-PU-2021-3553

ALT-PU-2022-2561

CVE-2021-45451

Affected Products

Alt Linux

Mbed Tls

References · 11

• https://github.com/ARMmbed/mbedtls/releases/tag/v3.1.0 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-45451 · Security Note
• https://osv.dev/vulnerability/CVE-2021-45451 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-45451 · Security Note
• https://ubuntu.com/security/CVE-2021-45451 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TALJHOYAYSUJTLN6BYGLO4YJGNZUY74W · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-45451 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IL66WKJGXY5AXMTFE7QDMGL3RIBD6PX5 · Vendor Advisory
• https://t.me/cibsecurity/34417 · Telegram Post
• https://t.me/cvenotify/24684 · Telegram Post
• https://t.me/cvenotify/24679 · Telegram Post