CVE-2019-17055 Missing authorization in n/a

What is CVE-2019-17055?

CVE-2019-17055 is a low-severity missing authorization vulnerability in Canonical Ubuntu Linux, published on 1 Oct 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

base_sock_create in drivers/isdn/mISDN/socket.c in the AF_ISDN network module in the Linux kernel through 5.3.2 does not enforce CAP_NET_RAW, which means that unprivileged users can create a raw socket, aka CID-b91ee4aa2a21.

Weakness: CWE-862

Which versions are affected by CVE-2019-17055?

It affects 8 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Opensuse Leap, Redhat Enterprise Linux Desktop and 2 more.

How do I fix CVE-2019-17055?

Apply the vendor's patch.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2019-17055 being exploited?

There is no known exploitation of CVE-2019-17055 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-17055, GHSA-c629-jm42-84f5, UBUNTU-CVE-2019-17055.