Cisco ClamAV up to 0.100.1 MEW Unpacker libclamav/mew.c unmew11 EXE File Memory out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Cisco ClamAV up to 0.100.1. Affected by this vulnerability is the function unmew11 of the file libclamav/mew.c of the component MEW Unpacker. This manipulation as part of EXE File causes out-of-bounds (Memory). This vulnerability appears as CVE-2018-15378. The attack requires local access. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco ClamAV up to 0.100.1 (Anti-Malware Software). It has been declared as problematic. Affected by this vulnerability is the function unmew11 of the file libclamav/mew.c of the component MEW Unpacker. The manipulation as part of a EXE File leads to a out-of-bounds vulnerability (Memory). The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

A vulnerability in ClamAV versions prior to 0.100.2 could allow an attacker to cause a denial of service (DoS) condition. The vulnerability is due to an error related to the MEW unpacker within the "unmew11()" function (libclamav/mew.c), which can be exploited to trigger an invalid read memory access via a specially crafted EXE file.

The bug was discovered 10/03/2018. The weakness was presented 10/15/2018 (Website). It is possible to read the advisory at secuniaresearch.flexerasoftware.com. This vulnerability is known as CVE-2018-15378 since 08/17/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. 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 8 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 118082 (Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : clamav vulnerability (USN-3789-1)), 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 171684 (SUSE Enterprise Linux Security Update for clamav (SUSE-SU-2018:3441-1)).

Upgrading to version 0.100.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (118082) and Secunia (SA83000†). See VDB-122307, VDB-122308 and VDB-122309 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Name: Memory
Class: Out-of-bounds / Memory
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 118082
Nessus Name: Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : clamav vulnerability (USN-3789-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: ClamAV 0.100.2

Timelineinfo

08/17/2018 🔍
10/03/2018 +47 days 🔍
10/11/2018 +8 days 🔍
10/12/2018 +1 days 🔍
10/15/2018 +2 days 🔍
10/15/2018 +0 days 🔍
10/16/2018 +1 days 🔍
03/15/2025 +2342 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: USN-3789-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-15378 (🔍)
GCVE (CVE): GCVE-0-2018-15378
GCVE (VulDB): GCVE-100-125323
Secunia: 83000

See also: 🔍

Entryinfo

Created: 10/16/2018 08:46
Updated: 03/15/2025 04:26
Changes: 10/16/2018 08:46 (77), 06/08/2020 18:18 (2), 05/25/2023 13:30 (4), 03/15/2025 04:26 (16)
Complete: 🔍
Cache ID: 216::103

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