Vulnerability Name:

CVE-2017-5550 (CCN-121666)

Assigned:2017-02-06
Published:2017-02-06
Updated:2017-02-09
Summary:Off-by-one error in the pipe_advance function in lib/iov_iter.c in the Linux kernel before 4.9.5 allows local users to obtain sensitive information from uninitialized heap-memory locations in opportunistic circumstances by reading from a pipe after an incorrect buffer-release decision.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/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): None
Availibility (A): None
6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/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): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:2.1 Low (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2017-5550

Source: CCN
Type: Linux Kernel GIT Repository
fix a fencepost error in pipe_advance()

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb

Source: CONFIRM
Type: Release Notes, Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.5

Source: CCN
Type: oss-sec Mailing List, Fri, 20 Jan 2017 22:24:00 -0500
Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel

Source: MLIST
Type: Mailing List, Patch, Third Party Advisory
[oss-security] 20170120 Re: CVE REQUEST: linux kernel: process with pgid zero able to crash kernel

Source: BID
Type: Third Party Advisory, VDB Entry
95716

Source: CCN
Type: BID-95716
Linux Kernel CVE-2017-5550 Local Information Disclosure Vulnerability

Source: CONFIRM
Type: Issue Tracking, Patch
https://bugzilla.redhat.com/show_bug.cgi?id=1416116

Source: XF
Type: UNKNOWN
linux-kernel-cve20175550-info-disc(121666)

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/b9dc6f65bc5e232d1c05fe34b5daadc7e8bbf1fb

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version <= 4.9.4)

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

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.bionic:def:201755500000000
    V
    CVE-2017-5550 on Ubuntu 18.04 LTS (bionic) - medium.
    2017-02-06
    oval:com.ubuntu.artful:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 17.10 (artful) - medium.
    2017-02-06
    oval:com.ubuntu.trusty:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 14.04 LTS (trusty) - medium.
    2017-02-06
    oval:com.ubuntu.xenial:def:201755500000000
    V
    CVE-2017-5550 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-02-06
    oval:com.ubuntu.bionic:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 18.04 LTS (bionic) - medium.
    2017-02-06
    oval:com.ubuntu.xenial:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 16.04 LTS (xenial) - medium.
    2017-02-06
    oval:com.ubuntu.cosmic:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 18.10 (cosmic) - medium.
    2017-02-06
    oval:com.ubuntu.cosmic:def:201755500000000
    V
    CVE-2017-5550 on Ubuntu 18.10 (cosmic) - medium.
    2017-02-06
    oval:com.ubuntu.precise:def:20175550000
    V
    CVE-2017-5550 on Ubuntu 12.04 LTS (precise) - medium.
    2017-02-06
    BACK
    linux linux kernel *
    linux linux kernel *