BitDefender GravityZone Installer Filename signature verification

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 (≈)
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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.
8.5$0-$5k0.00

Summaryinfo

A vulnerability was found in BitDefender GravityZone. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component Installer. Executing a manipulation of the argument Filename can lead to signature verification. This vulnerability is registered as CVE-2018-8955. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability has been found in BitDefender GravityZone (version now known) and classified as critical. This vulnerability affects some unknown processing of the component Installer. The manipulation of the argument Filename with an unknown input leads to a signature verification vulnerability. The CWE definition for the vulnerability is CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The installer for BitDefender GravityZone relies on an encoded string in a filename to determine the URL for installation metadata, which allows remote attackers to execute arbitrary code by changing the filename while leaving the file's digital signature unchanged.

The bug was discovered 10/22/2018. The weakness was published 10/24/2018 as not defined mailinglist post (Full-Disclosure). The advisory is available at seclists.org. This vulnerability was named CVE-2018-8955 since 03/22/2018. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Signature verification
CWE: CWE-347 / CWE-345
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/22/2018 🔍
10/22/2018 +213 days 🔍
10/24/2018 +1 days 🔍
10/24/2018 +0 days 🔍
10/25/2018 +1 days 🔍
06/03/2023 +1682 days 🔍

Sourcesinfo

Advisory: 149900
Status: Not defined

CVE: CVE-2018-8955 (🔍)
GCVE (CVE): GCVE-0-2018-8955
GCVE (VulDB): GCVE-100-125950
SecurityTracker: 1041940

Entryinfo

Created: 10/25/2018 06:55
Updated: 06/03/2023 07:16
Changes: 10/25/2018 06:55 (57), 04/06/2020 16:41 (1), 06/03/2023 07:16 (4)
Complete: 🔍
Cache ID: 216::103

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