GNU binutils 2.30 libbfd coffgen.c coff_pointerize_aux input validation

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.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability marked as critical has been reported in GNU binutils 2.30. This impacts the function coff_pointerize_aux of the file coffgen.c of the component libbfd. This manipulation causes input validation. This vulnerability is handled as CVE-2018-7208. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in GNU binutils 2.30 (Programming Tool Software). It has been declared as critical. Affected by this vulnerability is the function coff_pointerize_aux of the file coffgen.c of the component libbfd. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In the coff_pointerize_aux function in coffgen.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.30, an index is not validated, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted file, as demonstrated by objcopy of a COFF object.

The bug was discovered 01/24/2018. The weakness was released 02/18/2018 as Bug 22741 as confirmed bug report (Bugzilla). It is possible to read the advisory at sourceware.org. This vulnerability is known as CVE-2018-7208 since 02/17/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 24 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110730 (EulerOS 2.0 SP3 : binutils (EulerOS-SA-2018-1154)), 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 237010 (Red Hat Update for binutils (RHSA-2018:3032)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 4 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (110730) and SecurityFocus (BID 103077†). Entries connected to this vulnerability are available at VDB-113950, VDB-113951, VDB-114041 and VDB-114042. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Programming Tool Software

Vendor

Name

binutils

Version

2.30

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: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
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: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 110730
Nessus Name: EulerOS 2.0 SP3 : binutils (EulerOS-SA-2018-1154)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Timelineinfo

01/24/2018 🔍
02/17/2018 +24 days 🔍
02/17/2018 +0 days 🔍
02/17/2018 +0 days 🔍
02/18/2018 +1 days 🔍
02/18/2018 +0 days 🔍
06/07/2018 +109 days 🔍
06/28/2018 +21 days 🔍
01/06/2020 +557 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bug 22741
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-7208 (🔍)
GCVE (CVE): GCVE-0-2018-7208
GCVE (VulDB): GCVE-100-113551
SecurityFocus: 103077 - GNU Binutils CVE-2018-7208 Remote Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 02/18/2018 10:49
Updated: 01/06/2020 15:58
Changes: 02/18/2018 10:49 (76), 01/06/2020 15:58 (9)
Complete: 🔍
Cache ID: 216::103