Debian Security Advisory

DLA-1862-1 linux -- LTS security update

Date Reported:

27 Jul 2019

Affected Packages:

linux

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 930904.
In Mitre's CVE dictionary: CVE-2019-2101, CVE-2019-10639, CVE-2019-13272.

More information:

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

CVE-2019-2101
Andrey Konovalov discovered that the USB Video Class driver (uvcvideo) did not consistently handle a type field in device descriptors, which could result in a heap buffer overflow. This could be used for denial of service or possibly for privilege escalation.
CVE-2019-10639
Amit Klein and Benny Pinkas discovered that the generation of IP packet IDs used a weak hash function that incorporated a kernel virtual address. In Linux 3.16 this hash function is not used for IP IDs but is used for other purposes in the network stack. In custom kernel configurations that enable kASLR, this might weaken kASLR.
CVE-2019-13272
Jann Horn discovered that the ptrace subsystem in the Linux kernel mishandles the management of the credentials of a process that wants to create a ptrace relationship, allowing a local user to obtain root privileges under certain scenarios.

For Debian 8 Jessie, these problems have been fixed in version 3.16.70-1. This update also fixes a regression introduced by the original fix for CVE-2019-11478 (#930904), and includes other fixes from upstream stable updates.

We recommend that you upgrade your linux and linux-latest packages. You will need to use "apt-get upgrade --with-new-pkgs" or apt upgrade as the binary package names have changed.

We recommend that you upgrade your linux packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS