Versions Affected : All versions prior to TrueNAS 12.0-U6


Description

There are two issues fixed in this security advisory: CVE-2021-23840 & CVE-2021-23841

CVE-2021-23840 : Calls to EVP_CipherUpdate(), EVP_EncryptUpdate() and EVP_DecryptUpdate() may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. CVE-2021-23841 : The OpenSSL public API function X509_issuer_and_serial_hash() attempts to create a unique hash value based on the issuer and serial number data contained within an X509 certificate. However it fails to correctly handle any errors that may occur while parsing the issuer field (which might occur if the issuer field is maliciously constructed).


Workaround

No workaround is available.


Mitigation

  • Upgrade to TrueNAS 12.0-U6 or later.

Commit


Further information