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.
5.3	$0-$5k	0.00

A vulnerability classified as problematic was found in Cisco ClamAV 0.99.2 (Anti-Malware Software). This vulnerability affects the function wwunpack of the file libclamav/wwunpack.c of the component WWPack Compression Handler. The manipulation as part of a PE File leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect availability. CVE summarizes:

The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression.

The bug was discovered 08/06/2017. The weakness was released 08/07/2017 as Bug 11798 as not defined bug report (Bugzilla). The advisory is shared for download at bugzilla.clamav.net. This vulnerability was named CVE-2017-6420 since 03/01/2017. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 102581 (Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : clamav vulnerabilities (USN-3393-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196885 (Ubuntu Security Notification for Clamav Vulnerabilities (USN-3393-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 2 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (102581). Entry connected to this vulnerability is available at 104894.

Productinfo

Type

• Anti-Malware Software

Vendor

• Cisco

Name

• ClamAV

Version

• 0.99.2

License

• free

Support

• end of life (old version)

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
ATT&CK: Unknown

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: 102581
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : clamav vulnerabilities (USN-3393-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 800596
OpenVAS Name: ClamAV Multiple Denial of Service Vulnerabilities Aug17 (Windows)
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: 🔍

Patch: github.com

Timelineinfo

03/01/2017 🔍
08/06/2017 +158 days 🔍
08/06/2017 +0 days 🔍
08/07/2017 +1 days 🔍
08/07/2017 +0 days 🔍
08/17/2017 +10 days 🔍
08/18/2017 +1 days 🔍
12/15/2022 +1945 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: Bug 11798
Status: Not defined

CVE: CVE-2017-6420 (🔍)
See also: 🔍

Entryinfo

Created: 08/07/2017 12:52
Updated: 12/15/2022 09:07
Changes: 08/07/2017 12:52 (77), 06/08/2020 17:51 (3), 12/15/2022 09:07 (4)
Complete: 🔍

Discussion

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