Vulnerability Name:

CVE-2017-17863 (CCN-136722)

Assigned:2017-12-22
Published:2017-12-22
Updated:2018-03-16
Summary:kernel/bpf/verifier.c in the Linux kernel 4.9.x through 4.9.71 does not check the relationship between pointer values and the BPF stack, which allows local users to cause a denial of service (integer overflow or invalid memory access) or possibly have unspecified other impact.
CVSS v3 Severity:7.8 High (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
6.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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): High
Integrity (I): High
Availibility (A): High
5.5 Medium (CCN 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 (CCN 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
CVSS v2 Severity:7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-190
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2017-17863

Source: BID
Type: Third Party Advisory, VDB Entry
102321

Source: CCN
Type: BID-102321
Linux Kernel CVE-2017-17863 Local Denial of Service Vulnerability

Source: SECTRACK
Type: Third Party Advisory, VDB Entry
1040058

Source: MISC
Type: Patch
https://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-reject-out-of-bounds-stack-pointer-calculation.patch?h=stretch-security

Source: XF
Type: UNKNOWN
linux-kernel-cve201717863-dos(136722)

Source: CCN
Type: Packet Storm Security [01-12-2018]
eBPF 4.9-stable Verifier Bug Backported

Source: UBUNTU
Type: UNKNOWN
USN-3523-3

Source: UBUNTU
Type: UNKNOWN
USN-3523-2

Source: DEBIAN
Type: Third Party Advisory
DSA-4073

Source: CCN
Type: Spinics Web site
[PATCH stable/4.9 3/4] bpf: reject out-of-bounds stack pointer calculation

Source: MISC
Type: Issue Tracking, Patch
https://www.spinics.net/lists/stable/msg206985.html

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2017-17863

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version >= 4.9.0 and <= 4.9.71)

    • Configuration 2:
  • cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:linux:linux_kernel:4.9.71:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.artful:def:201717863000
    V
    		CVE-2017-17863 on Ubuntu 17.10 (artful) - high.
    2017-12-27
    oval:com.ubuntu.trusty:def:201717863000
    V
    		CVE-2017-17863 on Ubuntu 14.04 LTS (trusty) - high.
    2017-12-27
    oval:com.ubuntu.xenial:def:201717863000
    V
    		CVE-2017-17863 on Ubuntu 16.04 LTS (xenial) - high.
    2017-12-27
    oval:com.ubuntu.xenial:def:2017178630000000
    V
    		CVE-2017-17863 on Ubuntu 16.04 LTS (xenial) - high.
    2017-12-27
    BACK
    linux linux kernel *
    debian debian linux 9.0
    linux linux kernel 4.9.71