Vulnerability Name:

CVE-2017-18261 (CCN-142344)

Assigned:2017-08-11
Published:2017-08-11
Updated:2019-10-03
Summary:The arch_timer_reg_read_stable macro in arch/arm64/include/asm/arch_timer.h in the Linux kernel before 4.13 allows local users to cause a denial of service (infinite recursion) by writing to a file under /sys/kernel/debug in certain circumstances, as demonstrated by a scenario involving debugfs, ftrace, PREEMPT_TRACER, and FUNCTION_GRAPH_TRACER.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
3.5 Low (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Low
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
Vulnerability Type:CWE-835
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-18261

Source: MISC
Type: Patch, Vendor Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4

Source: XF
Type: UNKNOWN
linux-kernel-cve201718261-dos(142344)

Source: CCN
Type: Linux Kernel GIT Repository
clocksource/drivers/arm_arch_timer: Avoid infinite recursion when ftrace is enabled

Source: MISC
Type: Patch, Vendor Advisory
https://github.com/torvalds/linux/commit/adb4f11e0a8f4e29900adb2b7af28b6bbd5c1fa4

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2017-18261

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 4.13)

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.12.10:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:2017182610000000
    V
    		CVE-2017-18261 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-04-19
    oval:com.ubuntu.artful:def:201718261000
    V
    		CVE-2017-18261 on Ubuntu 17.10 (artful) - medium.
    2018-04-19
    oval:com.ubuntu.xenial:def:201718261000
    V
    		CVE-2017-18261 on Ubuntu 16.04 LTS (xenial) - medium.
    2018-04-19
    oval:com.ubuntu.bionic:def:201718261000
    V
    		CVE-2017-18261 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-04-19
    oval:com.ubuntu.cosmic:def:2017182610000000
    V
    		CVE-2017-18261 on Ubuntu 18.10 (cosmic) - medium.
    2018-04-19
    oval:com.ubuntu.cosmic:def:201718261000
    V
    		CVE-2017-18261 on Ubuntu 18.10 (cosmic) - medium.
    2018-04-19
    oval:com.ubuntu.bionic:def:2017182610000000
    V
    		CVE-2017-18261 on Ubuntu 18.04 LTS (bionic) - medium.
    2018-04-19
    oval:com.ubuntu.trusty:def:201718261000
    V
    		CVE-2017-18261 on Ubuntu 14.04 LTS (trusty) - medium.
    2018-04-19
    BACK
    linux linux kernel *
    linux linux kernel 4.12.10