Local denial of service in Avahi
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-3502 |
| CWE-ID | CWE-617 |
| Exploitation vector | Local |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Avahi Universal components / Libraries / Libraries used by multiple products |
| Vendor | avahi.org |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Reachable Assertion
EUVDB-ID: #VU83306
Risk: Low
CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-3502
CWE-ID:
CWE-617 - Reachable Assertion
Exploit availability: No
DescriptionThe vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion within the avahi_s_host_name_resolver_start function. A local user can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsAvahi: 0.1 - 0.8
External linkshttp://github.com/lathiat/avahi/issues/338
http://bugzilla.redhat.com/show_bug.cgi?id=1946914
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.
