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USN-5488-1: OpenSSL vulnerability

21 June 2022

OpenSSL could be made to crash or run programs when the c_rehash script is used.



  • openssl - Secure Socket Layer (SSL) cryptographic library and tools
  • openssl1.0 - Secure Socket Layer (SSL) cryptographic library and tools


Chancen and Daniel Fiala discovered that OpenSSL incorrectly handled the
c_rehash script. A local attacker could possibly use this issue to execute
arbitrary commands when c_rehash is run.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.04
Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.


Related notices

  • USN-5488-2: libssl-dev, openssl, libssl1.0.0, libssl-doc