Vulnerability Name:

CVE-2017-17862

Assigned:2017-12-23
Published:2017-11-23
Updated:2018-01-12
Summary:kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.
CVSS v3 Severity:5.5 Medium (CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (Temporal CVSS v3 Vector: CVSS:3.0/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
5.5 Medium (CCN CVSS v3 Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
4.8 Medium (CCN Temporal CVSS v3 Vector: CVSS:3.0/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: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
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-20
References:Source: MISC
Type: VENDOR_ADVISORY
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467

Source: BID
Type: VENDOR_ADVISORY
102325

Source: SECTRACK
Type: VENDOR_ADVISORY
1040057

Source: MISC
Type: VENDOR_ADVISORY
https://anonscm.debian.org/cgit/kernel/linux.git/tree/debian/patches/bugfix/all/bpf-fix-branch-pruning-logic.patch?h=stretch-security

Source: XF
Type: UNKNOWN
linux-kernel-cve201717862-dos(136721)

Source: MISC
Type: VENDOR_ADVISORY
https://github.com/torvalds/linux/commit/c131187db2d3fa2f8bf32fdf4e9a4ef805168467

Source: UBUNTU
Type: UNKNOWN
USN-3523-2

Source: DEBIAN
Type: VENDOR_ADVISORY
DSA-4073

Source: MISC
Type: VENDOR_ADVISORY
https://www.spinics.net/lists/stable/msg206984.html

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:4.14.8:*:*:*:*:*:*:*

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

  • Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.xenial:def:201717862000
    V
    CVE-2017-17862 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-12-27
    oval:com.ubuntu.trusty:def:201717862000
    V
    CVE-2017-17862 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-12-27
    BACK
    linux linux_kernel 4.14.8
    debian debian_linux 9.0