PT-2026-25873 · Sjcl · Sjcl
Kr0Emer
·
Published
2026-03-17
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Updated
2026-03-25
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CVE-2026-4258
CVSS v4.0
7.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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 |
Name of the Vulnerable Software and Affected Versions
sjcl (affected versions not specified)
Description
The software is susceptible to an Improper Verification of Cryptographic Signature issue due to missing point-on-curve validation within the
sjcl.ecc.basicKey.publicKey() function. An attacker can potentially recover a victim's ECDH private key by sending specifically crafted off-curve public keys and monitoring ECDH outputs. The dhJavaEc() function directly returns the raw x-coordinate of the scalar multiplication result without hashing, which creates a plaintext oracle without requiring decryption feedback.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Verification of Cryptographic Signature
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Related Identifiers
Affected Products
Sjcl