EUVD-2026-67067
GHSA-4pgx-8hjp-cmmq
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Threat model requires physical write access to the drive (AV:P) and, for the code-execution path, victim use of the drive (UI:R); high confidentiality from offline key recovery and high integrity/availability from the planted payload.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
openssl_encrypt (pip package openssl-encrypt) before 1.4.9 contains two weaknesses in the portable USB drive feature, whose threat model treats the removable drive as untrusted (attacker with physical write access). USBDriveCreator._verify_integrity_file only validates files listed in the manifest, so files added to the drive - including a root-level autorun payload - are not detected and integrity verification still passes. Additionally, a globally constant, source-embedded KDF salt (_LEGACY_FIXED_SALT) is used to derive the drive encryption key for any drive lacking a per-drive salt file, defeating precomputation resistance and enabling an offline rainbow-table attack.
Articles & Coverage 2
AnalysisAI
Cryptographic integrity bypass and weak key derivation in the openssl-encrypt Python package (jahlives) before 1.4.9 let an attacker with physical write access to a portable USB drive plant an undetected root-level autorun payload and precompute the drive encryption key offline. The integrity verifier only checks manifest-listed files, so added files pass verification, while a hard-coded fallback KDF salt (_LEGACY_FIXED_SALT) enables an offline rainbow-table attack against drives lacking a per-drive salt. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires physical write access to an openssl-encrypt portable USB drive (the feature's own untrusted-drive threat model). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The published CVSS 4.0 vector (AV:N/AC:L/PR:N/UI:N, VC:H/VI:H/VA:H, base 9.3 Critical) conflicts sharply with the stated threat model: the description explicitly requires an attacker with PHYSICAL write access to a removable drive, which is AV:P - not the network vector (AV:N) the score claims. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who gains temporary physical access to a target's openssl-encrypt portable USB drive writes a malicious root-level autorun payload plus files not listed in the drive manifest; integrity verification passes because it only checks manifest entries, and when the victim later plugs in and uses the drive the payload runs. In parallel, because a drive without a per-drive salt uses the constant _LEGACY_FIXED_SALT, the attacker can precompute a rainbow table offline to recover the drive key and decrypt its contents. … |
| Remediation | Vendor-released patch: upgrade openssl-encrypt to version 1.4.9 or later (pip install --upgrade openssl-encrypt), the primary and authoritative fix per advisory GHSA-8jx3-27qf-3p97. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Audit all systems, development environments, and portable USB drives to identify any use of openssl-encrypt (jahlives) before version 1.4.9; immediately restrict physical access to affected media and disable USB autorun functionality system-wide. …
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