SB2017021631 - Fedora 24 update for kernel

Description

This security bulletin contains information about 2 vulnerabilities.

1) Null pointer dereference (CVE-ID: CVE-2017-5970)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to null pointer dereference error within the ipv4_pktinfo_prepare() function in net/ipv4/ip_sockglue.c. A remote non-authenticated attacker can perform a denial of service (DoS) attack.

2) Information exposure (CVE-ID: CVE-2017-5967)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: 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/E:U/U:Clear

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.

Remediation

Install update from vendor's website.

References

• https://bodhi.fedoraproject.org/updates/FEDORA-2017-787bc0d5b4