SB2019071735 - Input validation error in avahi (Alpine package)
Published: July 17, 2019
Security Bulletin ID
SB2019071735
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2017-6519)
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.
Remediation
Install update from vendor's website.
References
- 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