medium
4
CWE
862 250
Advisory Published
CVE Published
Updated

CVE-2019-17055

First published: Fri Sep 20 2019(Updated: )

A vulnerability was found in base_sock_create in drivers/isdn/mISDN/socket.c in the AF_ISDN network module in the Linux kernel does not enforce CAP_NET_RAW, which means that unprivileged users can create a raw socket. Reference: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b91ee4aa2a2199ba4d4650706c272985a5a32d80">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b91ee4aa2a2199ba4d4650706c272985a5a32d80</a>

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel<0:2.6.32-754.28.1.el6
0:2.6.32-754.28.1.el6
redhat/kernel-rt<0:3.10.0-1160.rt56.1131.el7
0:3.10.0-1160.rt56.1131.el7
redhat/kernel<0:3.10.0-1160.el7
0:3.10.0-1160.el7
redhat/kernel-rt<0:4.18.0-193.rt13.51.el8
0:4.18.0-193.rt13.51.el8
redhat/kernel<0:4.18.0-193.el8
0:4.18.0-193.el8
Linux Kernel<=5.3.2
Debian Linux=8.0
Red Hat Fedora=29
Ubuntu=14.04
Ubuntu=16.04
Ubuntu=18.04
Ubuntu=19.04
SUSE Linux=15.0
SUSE Linux=15.1
Red Hat Enterprise Linux Desktop=6.0
Red Hat Enterprise Linux Server=6.0
Red Hat Enterprise Linux Workstation=6.0
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1

Remedy

At this time the only known way to 'mitigate' this flaw is to blacklist the kernel module from being loaded. Creating raw sockets with this protocol is a method of communicating with ISDN hardware, a technology that is becoming less and less common. Check https://access.redhat.com/solutions/41278 for instructions on how to disable the mISDN_core.ko module.

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0edc3f703f7bcaf550774b5d43ab727bcd0fe06b

Remedy

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b91ee4aa2a2199ba4d4650706c272985a5a32d80

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2019-17055?

    CVE-2019-17055 is classified as a medium severity vulnerability due to its potential exploitation by unprivileged users.

  • How do I fix CVE-2019-17055?

    To fix CVE-2019-17055, upgrade to the recommended kernel versions provided by your Linux distribution, such as Red Hat or Debian.

  • Which systems are affected by CVE-2019-17055?

    CVE-2019-17055 affects Linux kernel versions up to 5.3.2 and various distributions, including Red Hat, Debian, and Ubuntu.

  • Is CVE-2019-17055 exploitable remotely?

    CVE-2019-17055 is not considered remotely exploitable as it requires local access to the system.

  • What is the impact of CVE-2019-17055?

    The impact of CVE-2019-17055 allows unprivileged users to create raw sockets, which could facilitate further attacks on the system.

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