CRITICAL
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
Published Feb 14, 2018
9.8
CRITICALCVSS 3.0
EPSS 3.12%
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.
Affected products
No data.
Configuration 2
OR
- 8.0
- 9.0
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
7.5 HIGH NVD
AV:N/AC:L/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.12% 0.03115
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.03115
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (18 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.12% (0.03115) | 87.35th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.29% (0.03292) | 86.85th | v5 (v2026.06.15) |
| May 26, 2026 | 2.75% (0.02750) | 86.19th | v4 (v2025.03.14) |
| Aug 31, 2025 | 0.56% (0.00563) | 67.37th | v4 (v2025.03.14) |
| Mar 29, 2025 | 1.59% (0.01589) | 70.08th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.54% (0.00544) | 65.76th | v4 (v2025.03.14) |
| Jul 20, 2024 | 1.18% (0.01183) | 85.25th | v3 (v2023.03.01) |
| Aug 17, 2023 | 1.18% (0.01183) | 83.29th | v3 (v2023.03.01) |
| Jul 8, 2023 | 1.55% (0.01552) | 85.39th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.93% (0.01932) | 86.78th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.11% (0.01108) | 55.18th | v2 (v2022.01.01) |
| Sep 17, 2022 | 1.11% (0.01108) | 53.57th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.11% (0.01108) | 51.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.11% (0.01108) | 29.61th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.66% (0.01659) | 34.20th | v1 |
| Jan 6, 2022 | 1.66% (0.01659) | 33.50th | v1 |
| Sep 1, 2021 | 1.66% (0.01659) | 73.96th | v1 |
| Apr 14, 2021 | 1.66% (0.01659) | 0.00th | v1 |
Weaknesses (1)
References (7)
- http://www.securityfocus.com/bid/103055 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog x_refsource_CONFIRMThird Party Advisory
- https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28 x_refsource_CONFIRMPatchThird Party Advisory
- https://security.gentoo.org/glsa/201804-19 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/4267-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.debian.org/security/2018/dsa-4138 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.debian.org/security/2018/dsa-4147 vendor-advisoryx_refsource_DEBIANThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/103055 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog | x_refsource_CONFIRMThird Party Advisory | |
| https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://security.gentoo.org/glsa/201804-19 | vendor-advisoryx_refsource_GENTOOThird Party Advisory | |
| https://usn.ubuntu.com/4267-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://www.debian.org/security/2018/dsa-4138 | vendor-advisoryx_refsource_DEBIANThird Party Advisory | |
| https://www.debian.org/security/2018/dsa-4147 | vendor-advisoryx_refsource_DEBIANThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Feb 14, 2018
Updated Aug 5, 2024
Reserved Feb 14, 2018
Link CVE-2017-18187
CISA Vulnrichment
Updated n/a