GNU C Library up to 2.26 glob.c glob User Name memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
8.4	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in GNU C Library up to 2.26. This affects the function glob of the file glob.c. The manipulation as part of User Name results in memory corruption. This vulnerability is reported as CVE-2017-15804. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in GNU C Library up to 2.26 (Software Library). It has been classified as critical. Affected is the function glob of the file glob.c. The manipulation as part of a User Name leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

The glob function in glob.c in the GNU C Library (aka glibc or libc6) before 2.27 contains a buffer overflow during unescaping of user names with the ~ operator.

The bug was discovered 10/22/2017. The weakness was disclosed 10/22/2017 as Bug 22332 as confirmed bug report (Bugzilla). The advisory is available at sourceware.org. This vulnerability is traded as CVE-2017-15804 since 10/22/2017. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 104293 (EulerOS 2.0 SP2 : glibc (EulerOS-SA-2017-1268)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Huawei Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171603 (SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2018:2883-1)).

Upgrading to version 2.27 eliminates this vulnerability. A possible mitigation has been published 3 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104293) and SecurityFocus (BID 101535†). The entries VDB-102848 and VDB-108303 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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
• 2.26

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: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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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: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 104293
Nessus Name: EulerOS 2.0 SP2 : glibc (EulerOS-SA-2017-1268)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 835249
OpenVAS Name: Fedora Update for glibc FEDORA-2017-fb5e227432
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: C Library 2.27
Patch: a159b53fa059947cc2548e3b0d5bdcf7b9630ba8

Timelineinfo

10/22/2017 🔍
10/22/2017 +0 days 🔍
10/22/2017 +0 days 🔍
10/22/2017 +0 days 🔍
10/22/2017 +0 days 🔍
10/23/2017 +1 days 🔍
10/25/2017 +2 days 🔍
11/01/2017 +7 days 🔍
01/04/2023 +1890 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bug 22332
Researcher: Tim Ruhsen
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-15804 (🔍)
GCVE (CVE): GCVE-0-2017-15804
GCVE (VulDB): GCVE-100-108402
SecurityFocus: 101535 - GNU glibc CVE-2017-15804 Heap Buffer Overflow Vulnerability

See also: 🔍

Entryinfo

Created: 10/23/2017 10:25
Updated: 01/04/2023 11:21
Changes: 10/23/2017 10:25 (76), 11/29/2019 09:06 (9), 01/19/2021 14:22 (2), 01/04/2023 11:21 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion

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