VDB
CVE-2018-1000520
CVE-2018-1000520
PUBLISHED
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..
EPSS 0.17% · 37.7th percentile
Risk Scores
EPSS Score
0.17%
37.7th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | mbedtls | 0, 2.16.2-1, 2.16.3-1 |
| Ubuntu:25.10 | mbedtls | 3.6.2-3ubuntu1, 0 |
| Ubuntu:18.04:LTS | mbedtls | 2.7.0-2, 0, 2.5.1-1ubuntu1 |
| Ubuntu:24.04:LTS | mbedtls | 0, 2.28.3-1, 2.28.7-1ubuntu1 |
| Ubuntu:22.04:LTS | mbedtls | 0, 2.16.11-0.3, 2.16.9-0.1ubuntu1 |
| Ubuntu:16.04:LTS | mbedtls | 2.2.1-1, 2.2.0-1, 2.1.2-1 |
Exploit Intelligence
Timeline
- Jun 26, 2018 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 28, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
- Jan 8, 2023 EPSS Score
References
- https://ubuntu.com/security/CVE-2018-1000520 third-party-advisory
- https://github.com/ARMmbed/mbedtls/issues/1561 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2018-1000520 third-party-advisory