Vulnerability Name:

CVE-2017-18187

Assigned:2017-06-26
Published:2017-06-26
Updated:2018-03-22
Summary: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.
CVSS v3 Severity:9.8 Critical (CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
5.3 Medium (CCN CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
4.6 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-190
References:Source: BID
Type: VENDOR_ADVISORY
103055

Source: XF
Type: UNKNOWN
arm-cve201718187-sec-bypass(139180)

Source: CONFIRM
Type: VENDOR_ADVISORY
https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog

Source: CONFIRM
Type: VENDOR_ADVISORY
https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28

Source: DEBIAN
Type: UNKNOWN
DSA-4138

Source: DEBIAN
Type: UNKNOWN
DSA-4147

Vulnerable Configuration:Configuration 1:
  • cpe:/a:arm:mbed_tls:2.6.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.opensuse.security:def:201718187
    V
    		CVE-2017-18187
    2018-08-15
    oval:com.ubuntu.artful:def:201718187000
    V
    		CVE-2017-18187 on Ubuntu 17.10 (artful) - untriaged.
    2018-02-14
    oval:com.ubuntu.trusty:def:201718187000
    V
    		CVE-2017-18187 on Ubuntu 14.04 LTS (trusty) - untriaged.
    2018-02-14
    oval:com.ubuntu.xenial:def:201718187000
    V
    		CVE-2017-18187 on Ubuntu 16.04 LTS (xenial) - untriaged.
    2018-02-14
    BACK
    arm mbed tls 2.6.0