CRITICAL
The SSL 3 HMAC functionality in wolfSSL CyaSSL 2.5.0 before 2.9.4 does not check the padding length when verification fails, which allows remote attackers to have unspecified impact via a crafted HMAC, which triggers an out-of-bounds read
Published Jan 28, 2020
9.8
CRITICALCVSS 3.1
EPSS 2.77%
Description
The SSL 3 HMAC functionality in wolfSSL CyaSSL 2.5.0 before 2.9.4 does not check the padding length when verification fails, which allows remote attackers to have unspecified impact via a crafted HMAC, which triggers an out-of-bounds read.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.1/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
No CVSS v3.0 score for this CVE.
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.
2.77% 0.02770
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02770
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.77% (0.02770) | 85.80th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.77% (0.02770) | 84.36th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.01% (0.01014) | 75.12th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.51% (0.02508) | 75.59th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.78% (0.00777) | 71.94th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.48% (0.00485) | 76.78th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.48% (0.00485) | 75.27th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.48% (0.00485) | 72.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
Weaknesses (1)
References (4)
- http://seclists.org/oss-sec/2014/q2/126 x_refsource_MISCMailing ListThird Party Advisory
- http://seclists.org/oss-sec/2014/q2/130 x_refsource_MISCMailing ListThird Party Advisory
- http://www.wolfssl.com/yaSSL/Blog/Entries/2014/4/11_wolfSSL_Security_Advisory__April_9%2C_2014.html x_refsource_CONFIRMVendor Advisory
- http://www.wolfssl.com/yaSSL/Docs-cyassl-changelog.html x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://seclists.org/oss-sec/2014/q2/126 | x_refsource_MISCMailing ListThird Party Advisory | |
| http://seclists.org/oss-sec/2014/q2/130 | x_refsource_MISCMailing ListThird Party Advisory | |
| http://www.wolfssl.com/yaSSL/Blog/Entries/2014/4/11_wolfSSL_Security_Advisory__April_9%2C_2014.html | x_refsource_CONFIRMVendor Advisory | |
| http://www.wolfssl.com/yaSSL/Docs-cyassl-changelog.html | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jan 28, 2020
Updated Aug 6, 2024
Reserved Apr 18, 2014
Link CVE-2014-2897
CISA Vulnrichment
Updated n/a