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 cve@mitre.org
| Affected Software | Affected Version | How 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 Linux kernel | <=5.3.2 | |
| Debian Debian Linux | =8.0 | |
| Fedoraproject Fedora | =29 | |
| Canonical Ubuntu Linux | =14.04 | |
| Canonical Ubuntu Linux | =16.04 | |
| Canonical Ubuntu Linux | =18.04 | |
| Canonical Ubuntu Linux | =19.04 | |
| openSUSE Leap | =15.0 | |
| openSUSE Leap | =15.1 | |
| Redhat Enterprise Linux Desktop | =6.0 | |
| Redhat Enterprise Linux Server | =6.0 | |
| Redhat Enterprise Linux Workstation | =6.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2019-17055 https://nvd.nist.gov/vuln/detail/CVE-2019-17055
- https://bugzilla.redhat.com/show_bug.cgi?id=1758248
- https://access.redhat.com/errata/RHSA-2020:0790
- https://access.redhat.com/errata/RHSA-2020:4062
- https://access.redhat.com/errata/RHSA-2020:4060
- https://access.redhat.com/errata/RHSA-2020:1567
- https://access.redhat.com/errata/RHSA-2020:1769
- https://access.redhat.com/security/cve/cve-2019-17055
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00035.html
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00039.html
- http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0edc3f703f7bcaf550774b5d43ab727bcd0fe06b
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b91ee4aa2a2199ba4d4650706c272985a5a32d80
- https://lists.debian.org/debian-lts-announce/2020/01/msg00013.html
- https://lists.debian.org/debian-lts-announce/2020/03/msg00001.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6JNEWGIK7QA24OIUUL67QZNJN52NB7T/
- https://seclists.org/bugtraq/2019/Nov/11
- https://usn.ubuntu.com/4184-1/
- https://usn.ubuntu.com/4185-1/
- https://usn.ubuntu.com/4185-2/
- https://usn.ubuntu.com/4186-1/
- https://usn.ubuntu.com/4186-2/
- https://launchpad.net/bugs/cve/CVE-2019-17055
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1758249
- https://access.redhat.com/solutions/41278
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U6JNEWGIK7QA24OIUUL67QZNJN52NB7T/
- https://git.kernel.org/linus/b91ee4aa2a2199ba4d4650706c272985a5a32d80
- https://security-tracker.debian.org/tracker/CVE-2019-17055
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17055
- https://nvd.nist.gov/vuln/detail/CVE-2019-17055
- https://ubuntu.com/security/CVE-2019-17055
Parent vulnerabilities
(Appears in the following advisories)
- collector/redhat-cve
- collector/nvd-index
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2019-17055
- agent/author
- agent/severity
- agent/weakness
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/references
- agent/tags
- collector/usn-cve
- source/Ubuntu
- agent/event
- agent/description
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- agent/trending
- package-manager/redhat
- vendor/linux
- canonical/linux linux kernel
- version/linux linux kernel/5.3.2
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/8.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/29
- vendor/canonical
- canonical/canonical ubuntu linux
- version/canonical ubuntu linux/14.04
- version/canonical ubuntu linux/16.04
- version/canonical ubuntu linux/18.04
- version/canonical ubuntu linux/19.04
- vendor/opensuse
- canonical/opensuse leap
- version/opensuse leap/15.0
- version/opensuse leap/15.1
- vendor/redhat
- canonical/redhat enterprise linux desktop
- version/redhat enterprise linux desktop/6.0
- canonical/redhat enterprise linux server
- version/redhat enterprise linux server/6.0
- canonical/redhat enterprise linux workstation
- version/redhat enterprise linux workstation/6.0
- package-manager/debian