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
 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

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-6519

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The 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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

avahi (Alpine package): 0.6.32-r4

CPE2.3 External links

https://git.alpinelinux.org/aports/commit/?id=40ecb4d9422fa1239e67388fe9ad532b730fa87d
https://git.alpinelinux.org/aports/commit/?id=02fd5297c8c53f1a397702e43b64d56f9cc574c9
https://git.alpinelinux.org/aports/commit/?id=4ef792fcbcde5c03768ed55cb37cd2ee38ab5ad6
https://git.alpinelinux.org/aports/commit/?id=6367c77373ad8cdc1a18f18f7ef27532d7275e14
https://git.alpinelinux.org/aports/commit/?id=6dd2468d5d955ed31de8344012436b2523cb0e45
https://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.



###SIDEBAR###