Multiple vulnerabilities in Avast Antivirus
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 4 |
| CVE-ID | CVE-2024-7227 CVE-2024-7232 CVE-2024-7233 CVE-2024-7228 |
| CWE-ID | CWE-59 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Avast Antivirus Client/Desktop applications / Antivirus software/Personal firewalls |
| Vendor | Avast Software s.r.o. |
Security Bulletin
This security bulletin contains information about 4 vulnerabilities.
1) Link following
EUVDB-ID: #VU95569
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2024-7227
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists dye to incorrect handling of symbolic links within the Avast Service (AvastSvc). A local user can create a symbolic link to a critical file on the system and delete it, which can result in privilege escalation. MitigationInstall updates from vendor's website.
Vulnerable software versionsAvast Antivirus: 1 - 2016.11.1.2262
External linkshttp://www.zerodayinitiative.com/advisories/ZDI-24-1003/
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) Link following
EUVDB-ID: #VU95568
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2024-7232
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists dye to incorrect handling of symbolic links within the Avast Service (AvastSvc). A local user can create a symbolic link to a critical folder on the system and delete it, which can result in privilege escalation. MitigationInstall updates from vendor's website.
Vulnerable software versionsAvast Antivirus: 1 - 2016.11.1.2262
External linkshttp://www.zerodayinitiative.com/advisories/ZDI-24-1004/
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.
3) Link following
EUVDB-ID: #VU95567
Risk: Low
CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2024-7233
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists dye to incorrect handling of symbolic links within the Avast Service (AvastSvc). A local user can create a symbolic link to a critical folder on the system and delete it, which can result in privilege escalation.
Install updates from vendor's website.
Vulnerable software versionsAvast Antivirus: 1 - 2016.11.1.2262
External linkshttp://www.zerodayinitiative.com/advisories/ZDI-24-1005/
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.
4) Link following
EUVDB-ID: #VU95566
Risk: Low
CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2024-7228
CWE-ID:
CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists dye to incorrect handling of symbolic links within the Avast Service. A local user can abuse the service to create a folder, which can lead to a denial of service.
Install updates from vendor's website.
Vulnerable software versionsAvast Antivirus: 1 - 2016.11.1.2262
External linkshttp://www.zerodayinitiative.com/advisories/ZDI-24-999/
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.
