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Vulnerability record · CVE-2017-18187 · published 14 February 2018

CVE-2017-18187: Arm mbed tls integer overflow vulnerability

Arm · Mbed Tls

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.

9.8 CVSS 3.0 Critical EPSS 3.1% · top 12.7% CWE-190 · Integer overflow
9.8CVSS 3.0 base score, v2 7.5
3.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
14References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/103055 Third Party AdvisoryVDB Entry
https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog Third Party Advisory
https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28 PatchThird Party Advisory
https://security.gentoo.org/glsa/201804-19 Third Party Advisory
https://usn.ubuntu.com/4267-1/
https://www.debian.org/security/2018/dsa-4138 Third Party Advisory
https://www.debian.org/security/2018/dsa-4147 Third Party Advisory
http://www.securityfocus.com/bid/103055 Third Party AdvisoryVDB Entry
https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog Third Party Advisory
https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28 PatchThird Party Advisory
https://security.gentoo.org/glsa/201804-19 Third Party Advisory
https://usn.ubuntu.com/4267-1/
https://www.debian.org/security/2018/dsa-4138 Third Party Advisory
https://www.debian.org/security/2018/dsa-4147 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2017-18187), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.