SB2017071417 - Denial of service in linux-firmware (Alpine package)
Published: July 14, 2017
Security Bulletin ID
SB2017071417
Severity
Medium
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) Denial of service (CVE-ID: CVE-2017-8779)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an error in xdr_bytes() and xdr_string() functions when processing RPC data during memory allocation within rpcbind implementation. A remote unauthenticated attacker can send a specially crafted UDP request to port 111 and consume up to 4 gigabytes of memory per request.
Successful exploitation of this vulnerability may result in denial of service (DoS) conditions.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=07b9652003eee6c334b9e37f189ab59c2a6617a3
- https://git.alpinelinux.org/aports/commit/?id=bdaa9eb015d20e4539353d48dc00a624bfb2797c
- https://git.alpinelinux.org/aports/commit/?id=d2bfb22c8e8f67ad7d8d02704f35ec4d2a19f9b9
- https://git.alpinelinux.org/aports/commit/?id=19ae9575a3b6ad8c7de8402b0926e36b51582544