GNU C Library up to 2.25 LD_LIBRARY_PATH memory corruption

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6.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in GNU C Library up to 2.25. Affected is an unknown function. This manipulation of the argument LD_LIBRARY_PATH causes memory corruption. This vulnerability appears as CVE-2017-1000366. The attack requires local access. In addition, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in GNU C Library up to 2.25 (Software Library). Affected by this vulnerability is an unknown code. The manipulation of the argument LD_LIBRARY_PATH with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

glibc contains a vulnerability that allows specially crafted LD_LIBRARY_PATH values to manipulate the heap/stack, causing them to alias, potentially resulting in arbitrary code execution. Please note that additional hardening changes have been made to glibc to prevent manipulation of stack and heap memory but these issues are not directly exploitable, as such they have not been given a CVE. This affects glibc 2.25 and earlier.

The bug was discovered 06/20/2017. The weakness was presented 06/19/2017 with Qualys (Website). The advisory is shared at access.redhat.com. This vulnerability is known as CVE-2017-1000366 since 06/19/2017. The exploitation appears to be easy. An attack has to be approached locally. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known.

A public exploit has been developed by Qualys Corporation in ANSI C and been published 2 weeks after the advisory. 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 100873 (Amazon Linux AMI : glibc (ALAS-2017-844) (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 370433 (FreeBSD Advisory for kernel/ glibc Elevation of Privileges (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 (42274), Tenable (100873) and SecurityFocus (BID 99127†). See VDB-102671, VDB-123928, VDB-123929 and VDB-123930 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Software Library

Vendor

• GNU

Name

• C Library

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18
• 2.19
• 2.20
• 2.21
• 2.22
• 2.23
• 2.24
• 2.25

License

• open-source

Website

• Vendor: https://www.gnu.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

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: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Qualys Corporation
Programming Language: 🔍
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 100873
Nessus Name: Amazon Linux AMI : glibc (ALAS-2017-844) (Stack Clash)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703887
OpenVAS Name: Debian Security Advisory DSA 3887-1 (glibc - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍

Timelineinfo

06/19/2017 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/20/2017 +1 days 🔍
06/20/2017 +0 days 🔍
06/20/2017 +0 days 🔍
06/28/2017 +8 days 🔍
06/28/2017 +0 days 🔍
01/11/2025 +2754 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: RHSA-2017:1479
Researcher: Qualys Research Labs
Organization: Qualys
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-1000366 (🔍)
GCVE (CVE): GCVE-0-2017-1000366
GCVE (VulDB): GCVE-100-102673

OVAL: 🔍

SecurityFocus: 99127 - GNU glibc CVE-2017-1000366 Local Memory Corruption Vulnerability
SecurityTracker: 1038712

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

Entryinfo

Created: 06/20/2017 08:07
Updated: 01/11/2025 23:23
Changes: 06/20/2017 08:07 (82), 10/21/2019 16:50 (7), 12/29/2020 09:05 (2), 12/29/2020 09:11 (1), 12/08/2022 15:36 (3), 01/11/2025 23:23 (14)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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