ClamAV Antivirus Software up to 0.99.2 Email mbox.c null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

A vulnerability was found in ClamAV Antivirus Software up to 0.99.2 (Anti-Malware Software) and classified as critical. This issue affects an unknown code of the file mbox.c of the component Email Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation checking mechanisms in mbox.c during certain mail parsing functions of the ClamAV software. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted email to the affected device. An exploit could trigger a NULL pointer dereference condition when ClamAV scans the malicious email, which may result in a DoS condition.

The bug was discovered 01/25/2018. The weakness was disclosed 01/26/2018 (Website). It is possible to read the advisory at blog.clamav.net. The identification of this vulnerability is CVE-2017-12380 since 08/03/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 1 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 106431 (openSUSE Security Update : clamav (openSUSE-2018-102)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170721 (SUSE Enterprise Linux Security Update for clamav (SUSE-SU-2018:0255-1)).

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

The vulnerability is also documented in the vulnerability database at Tenable (106431). The entries 104894, 112481, 112482 and 112483 are pretty similar.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Current Price Estimation: 🔍

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Nessus ID: 106431
Nessus Name: openSUSE Security Update : clamav (openSUSE-2018-102)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 15485
OpenVAS Name: ClamAV messageAddArgument Multiple Vulnerabilities (Windows)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

08/03/2017 🔍
01/25/2018 +175 days 🔍
01/26/2018 +1 days 🔍
01/26/2018 +0 days 🔍
01/27/2018 +1 days 🔍
01/28/2018 +1 days 🔍
01/29/2018 +1 days 🔍
02/02/2023 +1830 days 🔍

Sourcesinfo

Advisory: USN-3550-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-12380 (🔍)
See also: 🔍

Entryinfo

Created: 01/27/2018 09:44
Updated: 02/02/2023 18:50
Changes: 01/27/2018 09:44 (76), 12/28/2019 08:42 (4), 02/02/2023 18:50 (4)
Complete: 🔍

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