|Description||An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)|
|NVD severity||medium (attack range: remote)|
|Debian Bugs||857560, 857561|
Vulnerable and fixed packages
The table below lists information on source packages.
|mbedtls (PTS)||stretch, sid||2.4.2-1||fixed|
|polarssl (PTS)||wheezy (security), wheezy||1.2.9-1~deb7u6||fixed|
|jessie (security), jessie||1.3.9-2.1+deb8u1||vulnerable|
The information below is based on the following data on fixed versions.
|Package||Type||Release||Fixed Version||Urgency||Origin||Debian Bugs|
[jessie] - polarssl <no-dsa> (Minor issue)
[wheezy] - polarssl <not-affected> (Vulnerable code not present)
Wheezy do not have any elliptic curve functionality. Jessie is affected however.