CVE-2018-1000520 Security feature bypass in n/a

What is CVE-2018-1000520?

CVE-2018-1000520 is a high-severity vulnerability in Arm Mbed Tls, published on 26 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ARM mbedTLS version 2.7.0 and earlier contains a Ciphersuite Allows Incorrectly Signed Certificates vulnerability in mbedtls_ssl_get_verify_result() that can result in ECDSA-signed certificates are accepted, when only RSA-signed ones should be.. This attack appear to be exploitable via Peers negotiate a TLS-ECDH-RSA-* ciphersuite. Any of the peers can then provide an ECDSA-signed certificate, when only an RSA-signed one should be accepted..

Weakness: CWE-295

Which versions are affected by CVE-2018-1000520?

It affects 1 product.

Products include Arm Mbed Tls.

How do I fix CVE-2018-1000520?

No fix has been published for CVE-2018-1000520 yet. Limit exposure of the affected software until one is available.

Is CVE-2018-1000520 being exploited?

There is no known exploitation of CVE-2018-1000520 in the wild and no public exploit code.

Other vulnerabilities in Arm Mbed Tls

• CVE-2026-34877 Deserialization in n/a Critical 9.8
• CVE-2022-46393 Memory corruption in n/a Critical 9.8
• CVE-2021-44732 Use after free in n/a Critical 9.8
• CVE-2017-18187 Integer overflow in n/a Critical 9.8
• CVE-2018-0487 Memory corruption in ARM mbed TLS before 1.3.22, before 2.1.10, and before 2.7.0 Critical 9.8

All Arm Mbed Tls vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-1000520, GHSA-fjhp-rw56-p66f, UBUNTU-CVE-2018-1000520.