Multiple vulnerabilities in ClamAV



| Updated: 2021-05-03
Risk High
Patch available YES
Number of vulnerabilities 4
CVE-ID CVE-2021-1386
CVE-2021-1405
CVE-2021-1404
CVE-2021-1252
CWE-ID CWE-427
CWE-476
CWE-125
CWE-835
Exploitation vector Network
Public exploit N/A
Vulnerable software
 ClamAV
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor ClamAV

Security Bulletin

This security bulletin contains information about 4 vulnerabilities.

Updated: 03.05.2021

Added vulnerabilities #2-4, raised bulletin risk level from Low to High.

1) Insecure DLL loading

EUVDB-ID: #VU51964

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-1386

CWE-ID: CWE-427 - Uncontrolled Search Path Element

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner. A local user can place a malicious .dll file in certain location on the system and execute arbitrary code with SYSTEM privileges.

Note, the vulnerability affects Windows installations only.

Mitigation

Install update from vendor's website.

Vulnerable software versions

ClamAV: 0.100.0 - 0.103.1

CPE2.3 External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-amp-imm-dll-tu79hvkO


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) NULL pointer dereference

EUVDB-ID: #VU52784

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1405

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can send a specially crafted email to the server and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ClamAV: 0.10 - 0.103.1

CPE2.3 External links

https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Out-of-bounds read

EUVDB-ID: #VU52793

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1404

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in the PDF parsing module. A remote attacker can create a specially crafted PDF file, pass it to the application, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ClamAV: 0.103.0 - 0.103.1

CPE2.3
External links

https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Infinite loop

EUVDB-ID: #VU52792

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-1252

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the Excel XLM macro parsing module. A remote attacker can consume all available system resources and cause denial of service conditions.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ClamAV: 0.103.0 - 0.103.1

CPE2.3
External links

https://blog.clamav.net/2021/04/clamav-01032-security-patch-release.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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