Linux Kernel 4.11.5 offset2lib Patch access control

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel 4.11.5. This affects an unknown part of the component offset2lib Patch. Executing a manipulation can lead to access control. This vulnerability is handled as CVE-2017-1000371. It is possible to launch the attack on the local host. Additionally, an exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Linux Kernel 4.11.5 (Operating System) and classified as critical. This vulnerability affects an unknown function of the component offset2lib Patch. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The offset2lib patch as used by the Linux Kernel contains a vulnerability, if RLIMIT_STACK is set to RLIM_INFINITY and 1 Gigabyte of memory is allocated (the maximum under the 1/4 restriction) then the stack will be grown down to 0x80000000, and as the PIE binary is mapped above 0x80000000 the minimum distance between the end of the PIE binary's read-write segment and the start of the stack becomes small enough that the stack guard page can be jumped over by an attacker. This affects Linux Kernel version 4.11.5. This is a different issue than CVE-2017-1000370 and CVE-2017-1000365. This issue appears to be limited to i386 based systems.

The bug was discovered 06/19/2017. The weakness was released 06/19/2017 with Qualys (Website). The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2017-1000371 since 06/19/2017. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 100874 (Amazon Linux AMI : kernel (ALAS-2017-845) (Stack Clash)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351011 (Amazon Linux Security Advisory for kernel: ALAS-2017-845 (Stack Clash)).

Upgrading eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (42273), Tenable (100874) and SecurityFocus (BID 99131†). Entries connected to this vulnerability are available at VDB-102671 and VDB-102675. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100874
Nessus Name: Amazon Linux AMI : kernel (ALAS-2017-845) (Stack Clash)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53754
OpenVAS Name: Debian Security Advisory DSA 3981-1 (linux - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Timelineinfo

06/19/2017 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/20/2017 +1 days 🔍
06/20/2017 +0 days 🔍
01/12/2025 +2763 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: access.redhat.com
Researcher: Qualys Research Labs
Organization: Qualys
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-1000371 (🔍)
GCVE (CVE): GCVE-0-2017-1000371
GCVE (VulDB): GCVE-100-102676

OVAL: 🔍

SecurityFocus: 99131 - Linux Kernel CVE-2017-1000371 Local Security Bypass Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 06/20/2017 08:08
Updated: 01/12/2025 09:01
Changes: 06/20/2017 08:08 (76), 10/19/2019 09:13 (10), 12/29/2020 09:25 (2), 01/12/2025 09:01 (17)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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