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USN-4001-1: libseccomp vulnerability

30 May 2019

libseccomp could allow unintended access to system calls.

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Releases

Packages

  • libseccomp - library for working with the Linux seccomp filter

Details

Jann Horn discovered that libseccomp did not correctly generate 64-bit
syscall argument comparisons with arithmetic operators (LT, GT, LE, GE).
An attacker could use this to bypass intended access restrictions for
argument-filtered system calls.

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.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

This update uses a new upstream release which includes additional bug
fixes. In general, a standard system update will make all the necessary
changes.

References

Related notices

  • USN-4001-2: seccomp, libseccomp, libseccomp2, libseccomp-dev