Integer overflow in Arm Mbed TLS
CVE-2017-18187
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.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.031 (87.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 88th percentile — 87.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.031 · change: +0.005
Affected products
- Arm Mbed TLS
- Debian Linux — versions 8.0, 9.0
Weakness classification (CWE)
References
- github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28 (Patch, Third Party Advisory)
- www.debian.org/security/2018/dsa-4147 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2018/dsa-4138 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201804-19 (vendor-advisory, Third Party Advisory)
- github.com/ARMmbed/mbedtls/blob/master/ChangeLog (Third Party Advisory)
- www.securityfocus.com/bid/103055 (VDB Entry, Third Party Advisory, vdb-entry)
- usn.ubuntu.com/4267-1/ (vendor-advisory)
Frequently asked questions
- What is CVE-2017-18187?
- CVE-2017-18187 is a critical-severity vulnerability in Arm Mbed TLS, classified under Integer Overflow or Wraparound. CVSS score: 9.8/10. Published 2018-02-14.
- How severe is CVE-2017-18187?
- Critical severity. CVSS v3 base score is 9.8 out of 10.