CVE-2017-18187
9.8
CRITICAL · CVSS 3.0 · EPSS 3.1% (pctl 87)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.12% — more likely to be exploited than 87% of all CVEs |
| Weakness | CWE-190 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2018-02-14 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| arm | mbed tls |
| debian | debian linux |
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://usn.ubuntu.com/4267-1/
- https://www.debian.org/security/2018/dsa-4138
- https://www.debian.org/security/2018/dsa-4147
- 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://usn.ubuntu.com/4267-1/
- https://www.debian.org/security/2018/dsa-4138
- https://www.debian.org/security/2018/dsa-4147
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