CVE-2018-9989 — ARM mbed TLS before 2
ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_psk_hint() that could cause a crash on invalid input.
Published
2018-04-10T19:29:00.323
Last modified
2026-06-05T19:38:32.047
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
ARM mbed TLS before 2.1.11, before 2.7.2, and before 2.8.0 has a buffer over-read in ssl_parse_server_psk_hint() that could cause a crash on invalid input.
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2018-04-10T19:29:00.323
- Last modified: 2026-06-05T19:38:32.047
09References
- github.com — https://github.com/ARMmbed/mbedtls/commit/5224a7544c95552553e2e6be0b4a789956a646…
- github.com — https://github.com/ARMmbed/mbedtls/commit/740b218386083dc708ce98ccc94a63a95cd562…
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
- tls.mbed.org — https://tls.mbed.org/tech-updates/releases/mbedtls-2.8.0-2.7.2-and-2.1.11-releas…
- github.com — https://github.com/ARMmbed/mbedtls/commit/5224a7544c95552553e2e6be0b4a789956a646…
- github.com — https://github.com/ARMmbed/mbedtls/commit/740b218386083dc708ce98ccc94a63a95cd562…
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2018/09/msg00029.html
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2021/11/msg00021.html
- tls.mbed.org — https://tls.mbed.org/tech-updates/releases/mbedtls-2.8.0-2.7.2-and-2.1.11-releas…
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