Denial of service in YARA
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | N/A |
| CWE-ID | CWE-125 CWE-190 |
| Exploitation vector | Network |
| Public exploit |
Public exploit code for vulnerability #1 is available. Public exploit code for vulnerability #2 is available. Public exploit code for vulnerability #3 is available. |
| Vulnerable software Subscribe |
YARA Server applications / Server solutions for antivurus protection |
| Vendor | VirusTotal |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
Updated: 29.01.2021
Added vulnerability #VU50140.
1) Out-of-bounds read
EUVDB-ID: #VU50077
Risk: Medium
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the dotnet module in macho_handle_segment_64(). A remote attacker can create a specially crafted data to the application and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsYARA: 4.0.0 - 4.0.3
External linkshttp://github.com/VirusTotal/yara/releases/tag/v4.0.4
http://www.x41-dsec.de/lab/advisories/x41-2021-001-yara/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
2) Out-of-bounds read
EUVDB-ID: #VU50078
Risk: Medium
CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: Yes
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition within the macho module in macho_parse_file(). A remote attacker can create a specially crafted data to the application and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsYARA: 4.0.0 - 4.0.3
External linkshttp://github.com/VirusTotal/yara/releases/tag/v4.0.4
http://www.x41-dsec.de/lab/advisories/x41-2021-001-yara/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
3) Integer overflow
EUVDB-ID: #VU50140
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-190 - Integer overflow
Exploit availability: Yes
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to integer overflow within the macho_parse_fat_file() function in the macho module. A remote attacker can pass specially crafted file to the application, trigger integer overflow and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsYARA: 4.0.0 - 4.0.3
External linkshttp://www.x41-dsec.de/lab/advisories/x41-2021-001-yara/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
