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CVE Record

CVE-2017-3226: 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

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

This issue affects devices using Das U-Boot to load AES-CBC encrypted boot environment data. A person with physical access may tamper with encrypted environment storage and trigger an error path that leaks useful cryptographic feedback, potentially helping decrypt protected data. Likely limited to embedded devices, appliances, IoT, industrial, or board-support-package builds using Das U-Boot 2017.09 with CONFIG_ENV_AES enabled and attacker-accessible environment storage. Prioritize this for devices in untrusted physical environments or products relying on U-Boot encrypted environment data to protect secrets. Internet-facing urgency is lower based on provided evidence. Mitigation focus: Inventory devices and firmware builds using Das U-Boot 2017.09.; Check whether CONFIG_ENV_AES is enabled in affected builds.; Consult U-Boot, device vendor, or BSP guidance for corrected bootloader updates..

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CWE-329: Exact CWE lookup

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CVE-2017-3226 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
DasU-Boot2017.09Listed
Weakness

CWE details

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CWE-329 · source CWE mapping

Generation of Predictable IV with CBC Mode

Generation of Predictable IV with CBC Mode represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.