Denial of service in Avahi
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-36217 |
| CWE-ID | CWE-476 |
| 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) NULL pointer dereference
EUVDB-ID: #VU54661
Risk: Low
CVSSv3.1: 5.4 [CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-36217
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the D-Bus interface. A local attacker can trigger denial of service conditions via the D-Bus interface or a "ping .local" command.
MitigationInstall update from vendor's website.
Vulnerable software versionsAvahi: 0.8
External linkshttp://github.com/lathiat/avahi/commit/9d31939e55280a733d930b15ac9e4dda4497680c
http://bugzilla.suse.com/show_bug.cgi?id=1188083
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.
