In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking
Published Nov 9, 2019
7.5
HIGHCVSS 3.1
EPSS 1.97%
Description
In wolfSSL 4.1.0 through 4.2.0c, there are missing sanity checks of memory accesses in parsing ASN.1 certificate data while handshaking. Specifically, there is a one-byte heap-based buffer overflow inside the DecodedCert structure in GetName in wolfcrypt/src/asn.c because the domain name location index is mishandled. Because a pointer is overwritten, there is an invalid free.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1 other source (MITRE) ▾
CVSS:3.0/AC:L/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:N
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2021-2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 1.97% (0.01972) | 79.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.97% (0.01972) | 77.77th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.21% (0.00214) | 59.84th | v3 (v2023.03.01) |
| Jun 13, 2024 | 0.21% (0.00214) | 59.55th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.21% (0.00214) | 57.52th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.84% (0.01840) | 47.83th | v5 (v2026.06.15) |
| Jan 6, 2022 | 1.84% (0.01840) | 47.32th | v1 |
| Sep 1, 2021 | 0.42% (0.00416) | 25.53th | v1 |
| Apr 14, 2021 | 0.42% (0.00416) | 0.00th | v1 |
References (1)
- https://github.com/wolfSSL/wolfssl/issues/2555 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/wolfSSL/wolfssl/issues/2555 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.