1. Ubuntu Security Notices
  2. USN-5770-1

USN-5770-1: GCC vulnerability

Publication date

8 December 2022

Overview

GNU Compiler Collection’s (GCC) random number generation could be made less random with specially crafted input.

Releases

Packages

Details

Todd Eisenberger discovered that certain versions of GNU Compiler
Collection (GCC) could be made to clobber the status flag of RDRAND
and RDSEED with specially crafted input. This could potentially lead
to less randomness in random number generation.

Todd Eisenberger discovered that certain versions of GNU Compiler
Collection (GCC) could be made to clobber the status flag of RDRAND
and RDSEED with specially crafted input. This could potentially lead
to less randomness in random number generation.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.04 xenial gnat-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
gcc-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
gcj-5-jdk –  5.4.0-6ubuntu1~16.04.12+esm2  
gccgo-6 –  6.0.1-0ubuntu1+esm1  
gccgo-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
gcj-5-jre-headless –  5.4.0-6ubuntu1~16.04.12+esm2  
gfortran-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
g++-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
gcj-5 –  5.4.0-6ubuntu1~16.04.12+esm2  
gdc-5 –  5.4.0-6ubuntu1~16.04.12+esm2  

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Get Ubuntu Pro

References

Have additional questions?

Talk to a member of the team ›