Permissions, Privileges, and Access Controls in Linux kernel - CVE-2019-17055

Vulnerability identifier: #VU22746

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-17055

CWE-ID: CWE-264

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the base_sock_create in drivers/isdn/mISDN/socket.c in the AF_ISDN network module for the Linux kernel does not enforce CAP_NET_RAW. A local unprivileged user can create a raw socket.

Linux kernel
Red Hat Enterprise Linux Workstation
CentOS
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Slackware Linux
Fedora

kernel (Red Hat package)
kernel-rt (Red Hat package)
linux-4.4.199/kernel-generic
linux-4.4.199/kernel-huge
linux-4.4.199/kernel-modules
linux-4.4.199/kernel-headers
kernel-tools
kernel-headers
kernel
Juniper Junos Space

Install update from vendor's website.

Linux kernel - update to 5.3.3
kernel (Red Hat package) - addressed in versions 2.6.32-754.28.1.el6, 3.10.0-1160.el7, 4.18.0-193.el8
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.rt56.1131.el7, 4.18.0-193.rt13.51.el8
linux-4.4.199/kernel-generic - update to 4.4.199
linux-4.4.199/kernel-huge - update to 4.4.199
linux-4.4.199/kernel-modules - update to 4.4.199
linux-4.4.199/kernel-headers - update to 4.4.199_smp
kernel-tools - addressed in versions 5.2.20-100.fc29, 5.3.4-300.fc31, 5.3.6-100.fc29
kernel-headers - addressed in versions 5.2.20-100.fc29, 5.3.4-300.fc31, 5.3.6-100.fc29
kernel - addressed in versions 5.2.20-100.fc29, 5.3.4-300.fc31, 5.3.6-100.fc29
Juniper Junos Space - update to 20.3R1

• 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

• Red Hat Enterprise Linux Workstation 6 update for kernel
• Red Hat Enterprise Linux 6 update for kernel
• CentOS 6 update for kernel
• Multiple vulnerabilities in Juniper Junos Space
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8 update for kernel
• Slackware Linux update for kernel
• Red Hat Enterprise Linux 7 update for kernel-rt
• Red Hat Enterprise Linux 7 update for kernel
• Fedora 31 update for kernel, kernel-headers, kernel-tools
• Fedora 29 update for kernel, kernel-headers, kernel-tools
• Fedora 29 update for kernel, kernel-headers, kernel-tools