Vulnerability Name:

CVE-2014-2038 (CCN-91307)

Assigned:2014-01-17
Published:2014-01-17
Updated:2020-08-26
Summary:The nfs_can_extend_write function in fs/nfs/write.c in the Linux kernel before 3.13.3 relies on a write delegation to extend a write operation without a certain up-to-date verification, which allows local users to obtain sensitive information from kernel memory in opportunistic circumstances by writing to a file in an NFS filesystem and then reading the same file.
CVSS v3 Severity:4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
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): Low
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)
1.6 Low (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N)
1.6 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
3.3 Low (REDHAT CVSS v2 Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N)
2.4 Low (REDHAT Temporal CVSS v2 Vector: AV:A/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Adjacent_Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-200
Vulnerability Consequences:Obtain Information
References:Source: MITRE
Type: CNA
CVE-2014-2038

Source: CONFIRM
Type: Patch, Vendor Advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=263b4509ec4d47e0da3e753f85a39ea12d1eff24

Source: CCN
Type: oss-security: Thu, 20 Feb 2014
CVE request: Linux kernel: nfs: information leakage

Source: CONFIRM
Type: Release Notes, Vendor Advisory
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.3

Source: MLIST
Type: Mailing List, Third Party Advisory
[oss-security] 20140221 Re: Re: CVE request: Linux kernel: nfs: information leakage

Source: CCN
Type: BID-65688
Linux Kernel NFS File System 'fs/nfs/write.c' Information Disclosure Vulnerability

Source: UBUNTU
Type: Third Party Advisory
USN-2137-1

Source: UBUNTU
Type: Third Party Advisory
USN-2140-1

Source: CCN
Type: Red Hat Bugzilla Bug 1066939
(CVE-2014-2038) CVE-2014-2038 kernel: nfs: data leak during extended writes

Source: CONFIRM
Type: Issue Tracking, Patch, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1066939

Source: XF
Type: UNKNOWN
linux-kernel-cve20142038-info-disc(91307)

Source: CCN
Type: Linux Kernel GIT Repository
nfs: always make sure page is up-to-date before extending a write to cover the entire page

Source: CONFIRM
Type: Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/263b4509ec4d47e0da3e753f85a39ea12d1eff24

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:*:*:*:*:*:*:*:* (Version < 3.13.3)

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/o:redhat:enterprise_linux:6:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/o:redhat:enterprise_linux:6::client:*:*:*:*:*

    • Configuration RedHat 3:
  • cpe:/o:redhat:enterprise_linux:6::computenode:*:*:*:*:*

    • Configuration RedHat 4:
  • cpe:/o:redhat:enterprise_linux:6::server:*:*:*:*:*

    • Configuration RedHat 5:
  • cpe:/o:redhat:enterprise_linux:6::workstation:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:accelatech:bizsearch:3.2:-:*:*:*:linux_kernel:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:24004
    P
    		USN-2137-1 -- linux-lts-saucy vulnerabilities
    2014-07-21
    oval:org.mitre.oval:def:24263
    P
    		USN-2140-1 -- linux vulnerabilities
    2014-07-21
    oval:com.redhat.rhsa:def:20140328
    P
    		RHSA-2014:0328: kernel security and bug fix update (Important)
    2014-03-25
    oval:com.ubuntu.precise:def:20142038000
    V
    		CVE-2014-2038 on Ubuntu 12.04 LTS (precise) - medium.
    2014-02-28
    oval:com.ubuntu.trusty:def:20142038000
    V
    		CVE-2014-2038 on Ubuntu 14.04 LTS (trusty) - medium.
    2014-02-28
    oval:com.ubuntu.xenial:def:201420380000000
    V
    		CVE-2014-2038 on Ubuntu 16.04 LTS (xenial) - medium.
    2014-02-28
    oval:com.ubuntu.xenial:def:20142038000
    V
    		CVE-2014-2038 on Ubuntu 16.04 LTS (xenial) - medium.
    2014-02-28
    BACK
    linux linux kernel *
    canonical ubuntu linux 12.04
    canonical ubuntu linux 13.10
    accelatech bizsearch 3.2 -