Vulnerability Name:

CVE-2015-2686 (CCN-101742)

Assigned:2015-03-23
Published:2015-03-23
Updated:2016-06-27
Summary:net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which allows local users to gain privileges by leveraging a subsystem that uses the copy_from_iter function in the iov_iter interface, as demonstrated by the Bluetooth subsystem.
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)
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
4.0 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/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): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:7.2 High (CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
5.3 Medium (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC: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
2.1 Low (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/A:N)
1.6 Low (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:P/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): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-264
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2015-2686

Source: CCN
Type: Linux Kernel GIT Repository
net: validate the range we feed to iov_iter_init() in sys_sendto/sys_recvfrom

Source: CONFIRM
Type: UNKNOWN
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea

Source: MISC
Type: UNKNOWN
http://grsecurity.net/~spender/viro.txt

Source: CCN
Type: oss-security Mailing List, Mon, 23 Mar 2015 18:25:35 +0100
CVE Request: Linux kernel: sys_sendto/sys_recvfrom does not validate the user provided ubuf pointer

Source: CCN
Type: oss-security Mailing List, Mon, 23 Mar 2015 17:35:19 -0400 (EDT)
Re: CVE Request: Linux kernel: sys_sendto/sys_recvfrom does not validate the user provided ubuf pointer

Source: MISC
Type: UNKNOWN
http://twitter.com/grsecurity/statuses/579050211605102592

Source: MISC
Type: UNKNOWN
http://twitter.com/grsecurity/statuses/579060953477701632

Source: MISC
Type: UNKNOWN
http://twitter.com/grsecurity/statuses/579075689439059968

Source: CONFIRM
Type: UNKNOWN
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3

Source: MLIST
Type: UNKNOWN
[oss-security] 20150323 CVE Request: Linux kernel: sys_sendto/sys_recvfrom does not validate the user provided ubuf pointer

Source: BID
Type: UNKNOWN
73286

Source: CCN
Type: BID-73286
Linux Kernel 'iov_iter_init()' Function Security Bypass Vulnerability

Source: CONFIRM
Type: UNKNOWN
https://bugzilla.redhat.com/show_bug.cgi?id=1205242

Source: XF
Type: UNKNOWN
linux-kernel-cve20152686-sec-bypass(101742)

Source: CONFIRM
Type: UNKNOWN
https://github.com/torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea

Vulnerable Configuration:Configuration 1:
  • cpe:/o:linux:linux_kernel:3.19:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:3.19.1:*:*:*:*:*:*:*
  • OR cpe:/o:linux:linux_kernel:3.19.2:*:*:*:*:*:*:*

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

  • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20152686000
    V
    CVE-2015-2686 on Ubuntu 12.04 LTS (precise) - medium.
    2016-05-02
    oval:com.ubuntu.trusty:def:20152686000
    V
    CVE-2015-2686 on Ubuntu 14.04 LTS (trusty) - medium.
    2016-05-02
    BACK
    linux linux kernel 3.19
    linux linux kernel 3.19.1
    linux linux kernel 3.19.2
    linux linux kernel *