Vulnerability CVE-2017-18187
Published: 2018-02-14

Description:
In ARM mbed TLS before 2.7.0, there is a bounds-check bypass through an integer overflow in PSK identity parsing in the ssl_parse_client_psk_identity() function in library/ssl_srv.c.

Type:

CWE-190

 (Integer Overflow or Wraparound)

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Debian -> Debian linux 
ARM -> Mbed tls 

 References:
http://www.securityfocus.com/bid/103055
https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog
https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28
https://security.gentoo.org/glsa/201804-19
https://www.debian.org/security/2018/dsa-4138
https://www.debian.org/security/2018/dsa-4147
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