Information disclosure in mbed TLS - CVE-2018-0497

Vulnerability identifier: #VU14174

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-0497

CWE-ID: CWE-200

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists in ARM mbed TLS  due to incomplete fix for CVE-2013-0169 and improper calculation of the secure hash algorithm-384 (SHA-384) when using a cipher suite based on cipher block chaining (CBC). A remote attacker who is able to observe and manipulate network packets can conduct a timing-based side-channel attack and partially recover the plaintext content.

mbed TLS
Debian Linux
Fedora
mbedtls (Ubuntu package)
mbedtls (Alpine package)
dislocker
nng
julia
nekovm
mbedtls
dolphin-emu

Update to version 2.12.0, 2.7.5 or 2.1.14.

mbed TLS - addressed in versions 2.1.14, 2.7.5, 2.12.0
mbedtls (Ubuntu package) - update to 2.2.1-2ubuntu0.3
mbedtls (Alpine package) - update to 2.7.5-r0
dislocker - addressed in versions 0.7.1-10.fc28, 0.7.1-10.fc29
nng - update to 1.0.1-2.fc29
julia - update to 1.0.1-3.fc29
nekovm - addressed in versions 2.2.0-8.fc28, 2.2.0-8.fc29
mbedtls - addressed in versions 2.7.5-1.el7, 2.13.0-1.fc28, 2.13.0-1.fc29
dolphin-emu - addressed in versions 5.0-25.fc28, 5.0-25.fc29

• https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2018-02

• Information disclosure vulnerabilities in ARM mbed TLS
• Debian update for mbedtls
• Ubuntu update for ARM mbed TLS
• Information disclosure in mbedtls (Alpine package)
• Fedora EPEL 7 update for mbedtls
• Fedora 29 update for dislocker, dolphin-emu, julia, mbedtls, nekovm, nng
• Fedora 28 update for dislocker, dolphin-emu, mbedtls, nekovm