Das U-Boot's AES-CBC encryption feature improperly handles an error condition and may allow attacks against the underlying cryptographic implementation and allow an attacker to decrypt the data
Published Jul 24, 2018
6.4
MEDIUMCVSS 3.0
EPSS 0.27%
Description
Das U-Boot is a device bootloader that can read its configuration from an AES encrypted file. Devices that make use of Das U-Boot's AES-CBC encryption feature using environment encryption (i.e., setting the configuration parameter CONFIG_ENV_AES=y) read environment variables from disk as the encrypted disk image is processed. An attacker with physical access to the device can manipulate the encrypted environment data to include a crafted two-byte sequence which triggers an error in environment variable parsing. This error condition is improperly handled by Das U-Boot, resulting in an immediate process termination with a debugging message.
Affected products
-
- Version 2017.09StatusaffectedConstraints<2017.09
- Version
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.
CVSS:3.0/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:M/Au:N/C:P/I:P/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 1, 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 (8 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.27% (0.00266) | 16.76th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.27% (0.00266) | 18.82th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00078) | 33.92th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00078) | 31.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- http://www.securityfocus.com/bid/100675 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://www.kb.cert.org/vuls/id/166743 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/100675 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://www.kb.cert.org/vuls/id/166743 | third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource |
Change history (0)
No recorded changes yet.