What’s Vulnerable › Vulnerabilities

CVE-2018-0487

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-02-13 · updated 2026-06-17
• Weakness: CWE-119

Description

ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow) via a crafted certificate chain that is mishandled during RSASSA-PSS signature verification within a TLS or DTLS session.

Affected products

• mbedtls: from 1.3.8 before 1.3.22; from 2.1.0 before 2.1.10; from 2.2.0 before 2.7.0 — fixed in 1.3.22, 2.1.10, 2.7.0
• Debian Linux: 8.0, 9.0

How to fix

Upgrade to a fixed version: mbedtls 1.3.22, 2.1.10, 2.7.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/103056
• https://security.gentoo.org/glsa/201804-19
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-01
• https://usn.ubuntu.com/4267-1/
• https://www.debian.org/security/2018/dsa-4138
• https://www.debian.org/security/2018/dsa-4147
• http://www.securityfocus.com/bid/103056
• https://security.gentoo.org/glsa/201804-19
• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-01
• https://usn.ubuntu.com/4267-1/
• https://www.debian.org/security/2018/dsa-4138
• https://www.debian.org/security/2018/dsa-4147

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