What’s Vulnerable › Vulnerabilities

CVE-2018-0497

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-07-28 · updated 2026-06-17

Description

ARM mbed TLS before 2.12.0, before 2.7.5, and before 2.1.14 allows remote attackers to achieve partial plaintext recovery (for a CBC based ciphersuite) via a timing-based side-channel attack. This vulnerability exists because of an incorrect fix (with a wrong SHA-384 calculation) for CVE-2013-0169.

Affected products

• mbedtls: before 2.1.14; from 2.2.0 before 2.7.5; from 2.8.0 before 2.12.0 — fixed in 2.1.14, 2.12.0, 2.7.5
• Debian Linux: 8.0, 9.0

How to fix

Upgrade to a fixed version: mbedtls 2.1.14, 2.12.0, 2.7.5. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-02
• https://usn.ubuntu.com/4267-1/
• https://www.debian.org/security/2018/dsa-4296
• https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-02
• https://usn.ubuntu.com/4267-1/
• https://www.debian.org/security/2018/dsa-4296

Get alerted when CVE-2018-0497 or the next vulnerability affects your stack