USN-4001-1: libseccomp vulnerability
libseccomp vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
libseccomp could allow unintended access to system calls.
Software Description
- 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.
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.04
- libseccomp2 – 2.4.1-0ubuntu0.19.04.3
- Ubuntu 18.10
- libseccomp2 – 2.4.1-0ubuntu0.18.10.3
- Ubuntu 18.04 LTS
- libseccomp2 – 2.4.1-0ubuntu0.18.04.2
- Ubuntu 16.04 LTS
- libseccomp2 – 2.4.1-0ubuntu0.16.04.2
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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
Source: USN-4001-1: libseccomp vulnerability
