ID |
CVE-2021-29444
|
Summary |
jose-browser-runtime is an npm package which provides a number of cryptographic functions. In versions prior to 3.11.4 the AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. But a possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). A patch was released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `>=3.11.4`. Users should upgrade to `^3.11.4`. |
References |
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Vulnerable Configurations |
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CVSS |
Base: | 4.3 (as of 21-03-2023 - 13:18) |
Impact: | |
Exploitability: | |
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CWE |
CWE-203 |
CAPEC |
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Access |
Vector | Complexity | Authentication |
NETWORK |
MEDIUM |
NONE |
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Impact |
Confidentiality | Integrity | Availability |
PARTIAL |
NONE |
NONE |
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cvss-vector
via4
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AV:N/AC:M/Au:N/C:P/I:N/A:N
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Last major update |
21-03-2023 - 13:18 |
Published |
16-04-2021 - 22:15 |
Last modified |
21-03-2023 - 13:18 |