Information exposure in Linux kernel - CVE-2017-5967

Vulnerability identifier: #VU92438

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-5967

CWE-ID: CWE-200

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to information exposure error within the __queue_delayed_work() function in kernel/workqueue.c, within the copyright() function in kernel/time/timer_stats.c, within the print_timer() function in kernel/time/timer_list.c, within the internal_add_timer(), do_init_timer(), __mod_timer(), add_timer_on(), del_timer(), try_to_del_timer_sync(), expire_timers() and init_timer_cpus() functions in kernel/time/timer.c, within the hrtimers_resume(), remove_hrtimer(), hrtimer_start_range_ns(), __hrtimer_init() and __run_hrtimer() functions in kernel/time/hrtimer.c, within the __kthread_queue_delayed_work() function in kernel/kthread.c. A local non-authenticated attacker can gain access to sensitive information.

Linux kernel
Ubuntu
Fedora
linux-image-virtual-lts-xenial (Ubuntu package)
linux-image-lowlatency-lts-xenial (Ubuntu package)
linux-image-generic-lts-xenial (Ubuntu package)
linux-image-generic-lpae-lts-xenial (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-powerpc64-smp (Ubuntu package)
linux-image-powerpc64-emb (Ubuntu package)
linux-image-powerpc-smp (Ubuntu package)
linux-image-powerpc-e500mc (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-4.4.0-208-powerpc64-smp (Ubuntu package)
linux-image-4.4.0-208-powerpc64-emb (Ubuntu package)
linux-image-4.4.0-208-powerpc-smp (Ubuntu package)
linux-image-4.4.0-208-powerpc-e500mc (Ubuntu package)
linux-image-4.4.0-208-lowlatency (Ubuntu package)
linux-image-4.4.0-208-generic-lpae (Ubuntu package)
linux-image-4.4.0-208-generic (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-4.4.0-1090-aws (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-4.4.0-1091-kvm (Ubuntu package)
linux-image-4.4.0-1126-aws (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-4.4.0-1150-raspi2 (Ubuntu package)
linux-image-snapdragon (Ubuntu package)
linux-image-4.4.0-1154-snapdragon (Ubuntu package)
kernel

Install update from vendor's repository.

linux-image-virtual-lts-xenial (Ubuntu package) - update to 4.4.0.208.181
linux-image-lowlatency-lts-xenial (Ubuntu package) - update to 4.4.0.208.181
linux-image-generic-lts-xenial (Ubuntu package) - update to 4.4.0.208.181
linux-image-generic-lpae-lts-xenial (Ubuntu package) - update to 4.4.0.208.181
linux-image-virtual (Ubuntu package) - update to 4.4.0.208.214
linux-image-powerpc64-smp (Ubuntu package) - update to 4.4.0.208.214
linux-image-powerpc64-emb (Ubuntu package) - update to 4.4.0.208.214
linux-image-powerpc-smp (Ubuntu package) - update to 4.4.0.208.214
linux-image-powerpc-e500mc (Ubuntu package) - update to 4.4.0.208.214
linux-image-lowlatency (Ubuntu package) - update to 4.4.0.208.214
linux-image-generic-lpae (Ubuntu package) - update to 4.4.0.208.214
linux-image-generic (Ubuntu package) - update to 4.4.0.208.214
linux-image-4.4.0-208-powerpc64-smp (Ubuntu package) - update to 4.4.0-208.240
linux-image-4.4.0-208-powerpc64-emb (Ubuntu package) - update to 4.4.0-208.240
linux-image-4.4.0-208-powerpc-smp (Ubuntu package) - update to 4.4.0-208.240
linux-image-4.4.0-208-powerpc-e500mc (Ubuntu package) - update to 4.4.0-208.240
linux-image-4.4.0-208-lowlatency (Ubuntu package) - update to 4.4.0-208.240~14.04.1
linux-image-4.4.0-208-generic-lpae (Ubuntu package) - update to 4.4.0-208.240~14.04.1
linux-image-4.4.0-208-generic (Ubuntu package) - update to 4.4.0-208.240~14.04.1
linux-image-aws (Ubuntu package) - addressed in versions 4.4.0.1090.87, 4.4.0.1126.131
linux-image-4.4.0-1090-aws (Ubuntu package) - update to 4.4.0-1090.94
linux-image-kvm (Ubuntu package) - update to 4.4.0.1091.89
linux-image-4.4.0-1091-kvm (Ubuntu package) - update to 4.4.0-1091.100
linux-image-4.4.0-1126-aws (Ubuntu package) - update to 4.4.0-1126.140
linux-image-raspi2 (Ubuntu package) - update to 4.4.0.1150.150
linux-image-4.4.0-1150-raspi2 (Ubuntu package) - update to 4.4.0-1150.161
linux-image-snapdragon (Ubuntu package) - update to 4.4.0.1154.146
linux-image-4.4.0-1154-snapdragon (Ubuntu package) - update to 4.4.0-1154.164
kernel - addressed in versions 4.9.10-100.fc24, 4.9.10-200.fc25

• http://git.kernel.org/cgit/linux/kernel/git/tip/tip.git/commit/?id=dfb4357da6ddbdf57d583ba64361c9d792b0e0b1
• http://www.securityfocus.com/bid/96271
• https://bugzilla.kernel.org/show_bug.cgi?id=193921

• Information exposure in Linux kernel timers
• Ubuntu update for linux
• Fedora 25 update for kernel
• Fedora 24 update for kernel