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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3466
                USN-4574-1: libseccomp-golang vulnerability
                              8 October 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           golang-github-seccomp-libseccomp-golang
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Confidential Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-18367  

Reference:         ESB-2020.2755

Original Bulletin: 
   https://usn.ubuntu.com/4574-1/

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USN-4574-1: libseccomp-golang vulnerability
07 October 2020

A system hardening measure could be bypassed.
Releases

  o Ubuntu 16.04 LTS

Packages

  o golang-github-seccomp-libseccomp-golang - a Go-based interface to the
    libseccomp library

Details

It was discovered that libseccomp-golang did not properly generate BPFs. If
a process were running under a restrictive seccomp filter that specified
multiple syscall arguments, the application could potentially bypass the
intended restrictions put in place by seccomp.

Update instructions

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

Ubuntu 16.04

  o golang-github-seccomp-libseccomp-golang-dev -
    0.0~git20150813.0.1b506fc-2+deb9u1build0.16.04.1

After a standard system update anything that depends on libseccomp-golang needs
to be rebuilt to make all the necessary changes.

References

  o CVE-2017-18367

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===========================================================================
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