Input validation error in avahi (Alpine package)
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2017-6519 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
avahi (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Input validation error
EUVDB-ID: #VU17349
Risk: Low
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2017-6519
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows remote attackers to perform a denial of service (DoS) attack.
The vulnerability exists due to avahi-daemon inadvertently responds to IPv6 unicast queries with source addresses that are not on-link. A remote attacker can submit specially crafted port-5353 UDP packet to trigger traffic amplification and cause the service to crash.
MitigationInstall update from vendor's website.
Vulnerable software versionsavahi (Alpine package): 0.6.32-r4
External linkshttp://git.alpinelinux.org/aports/commit/?id=40ecb4d9422fa1239e67388fe9ad532b730fa87d
http://git.alpinelinux.org/aports/commit/?id=02fd5297c8c53f1a397702e43b64d56f9cc574c9
http://git.alpinelinux.org/aports/commit/?id=4ef792fcbcde5c03768ed55cb37cd2ee38ab5ad6
http://git.alpinelinux.org/aports/commit/?id=6367c77373ad8cdc1a18f18f7ef27532d7275e14
http://git.alpinelinux.org/aports/commit/?id=6dd2468d5d955ed31de8344012436b2523cb0e45
http://git.alpinelinux.org/aports/commit/?id=8aeb1137796b022848fcbd5f0f617199eabe5cbe
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.
