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Vulnerability Details : CVE-2017-1000410

The Linux kernel version 3.3-rc1 and later is affected by a vulnerability lies in the processing of incoming L2CAP commands - ConfigRequest, and ConfigResponse messages. This info leak is a result of uninitialized stack variables that may be returned to an attacker in their uninitialized state. By manipulating the code flows that precede the handling of these configuration messages, an attacker can also gain some control over which data will be held in the uninitialized stack variables. This can allow him to bypass KASLR, and stack canaries protection - as both pointers and stack canaries may be leaked in this manner. Combining this vulnerability (for example) with the previously disclosed RCE vulnerability in L2CAP configuration parsing (CVE-2017-1000251) may allow an attacker to exploit the RCE against kernels which were built with the above mitigations. These are the specifics of this vulnerability: In the function l2cap_parse_conf_rsp and in the function l2cap_parse_conf_req the following variable is declared without initialization: struct l2cap_conf_efs efs; In addition, when parsing input configuration parameters in both of these functions, the switch case for handling EFS elements may skip the memcpy call that will write to the efs variable: ... case L2CAP_CONF_EFS: if (olen == sizeof(efs)) memcpy(&efs, (void *)val, olen); ... The olen in the above if is attacker controlled, and regardless of that if, in both of these functions the efs variable would eventually be added to the outgoing configuration request that is being built: l2cap_add_conf_opt(&ptr, L2CAP_CONF_EFS, sizeof(efs), (unsigned long) &efs); So by sending a configuration request, or response, that contains an L2CAP_CONF_EFS element, but with an element length that is not sizeof(efs) - the memcpy to the uninitialized efs variable can be avoided, and the uninitialized variable would be returned to the attacker (16 bytes).
Publish Date : 2017-12-07 Last Update Date : 2019-04-08
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- CVSS Scores & Vulnerability Types

CVSS Score
5.0
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Bypass a restriction or similarObtain Information
CWE ID 200

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2018:0654: kernel-alt security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20180654 unix
RHSA-2018:0676: kernel-rt security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20180676 unix
RHSA-2018:1062: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20181062 unix
RHSA-2018:1130: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20181130 unix
RHSA-2018:1319: kernel security and bug fix update (Important) oval:com.redhat.rhsa:def:20181319 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2017-1000410

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
2 OS Debian Debian Linux 9.0 Version Details Vulnerabilities
3 OS Linux Linux Kernel 3.14.8 Version Details Vulnerabilities
4 OS Linux Linux Kernel 4.14.90 Version Details Vulnerabilities
5 OS Linux Linux Kernel 4.15 RC5 Version Details Vulnerabilities
6 OS Linux Linux Kernel 4.15 RC6 Version Details Vulnerabilities
7 OS Linux Linux Kernel 4.15 RC1 Version Details Vulnerabilities
8 OS Linux Linux Kernel 4.15 RC7 Version Details Vulnerabilities
9 OS Linux Linux Kernel 4.15 RC2 Version Details Vulnerabilities
10 OS Linux Linux Kernel 4.15 RC3 Version Details Vulnerabilities
11 OS Linux Linux Kernel 4.15 RC4 Version Details Vulnerabilities
12 OS Redhat Enterprise Linux Desktop 6.0 Version Details Vulnerabilities
13 OS Redhat Enterprise Linux Desktop 7.0 Version Details Vulnerabilities
14 OS Redhat Enterprise Linux Server 6.0 Version Details Vulnerabilities
15 OS Redhat Enterprise Linux Server 7.0 Version Details Vulnerabilities
16 OS Redhat Enterprise Linux Server Aus 7.6 Version Details Vulnerabilities
17 OS Redhat Enterprise Linux Server Eus 7.4 Version Details Vulnerabilities
18 OS Redhat Enterprise Linux Server Eus 7.6 Version Details Vulnerabilities
19 OS Redhat Enterprise Linux Server Tus 7.4 Version Details Vulnerabilities
20 OS Redhat Enterprise Linux Server Tus 7.6 Version Details Vulnerabilities
21 OS Redhat Enterprise Linux Workstation 6.0 Version Details Vulnerabilities
22 OS Redhat Enterprise Linux Workstation 7.0 Version Details Vulnerabilities
23 Application Redhat Virtualization Host 4.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 2
Linux Linux Kernel 9
Redhat Enterprise Linux Desktop 2
Redhat Enterprise Linux Server 2
Redhat Enterprise Linux Server Aus 1
Redhat Enterprise Linux Server Eus 2
Redhat Enterprise Linux Server Tus 2
Redhat Enterprise Linux Workstation 2
Redhat Virtualization Host 1

- References For CVE-2017-1000410

http://seclists.org/oss-sec/2017/q4/357
MLIST [oss-security] 20171206 Info Leak in the Linux Kernel via Bluetooth
https://www.debian.org/security/2018/dsa-4082
DEBIAN DSA-4082
https://usn.ubuntu.com/3933-1/
UBUNTU USN-3933-1
https://usn.ubuntu.com/3933-2/
UBUNTU USN-3933-2
https://access.redhat.com/errata/RHSA-2018:1319
REDHAT RHSA-2018:1319
https://access.redhat.com/errata/RHSA-2018:1062
REDHAT RHSA-2018:1062
https://access.redhat.com/errata/RHSA-2018:1130
REDHAT RHSA-2018:1130
https://help.ecostruxureit.com/display/public/UADCE725/Security+fixes+in+StruxureWare+Data+Center+Expert+v7.6.0 CONFIRM
https://www.debian.org/security/2017/dsa-4073
DEBIAN DSA-4073
http://www.securityfocus.com/bid/102101
BID 102101 Linux Kernel CVE-2017-1000410 Information Disclosure Vulnerability Release Date:2018-05-02
https://access.redhat.com/errata/RHSA-2018:0676
REDHAT RHSA-2018:0676
https://access.redhat.com/errata/RHSA-2018:0654
REDHAT RHSA-2018:0654
https://access.redhat.com/errata/RHSA-2018:1170
REDHAT RHSA-2018:1170

- Metasploit Modules Related To CVE-2017-1000410

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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