#VU6434 Denial of service in Glibc - CVE-2017-8804
Published: May 7, 2017 / Updated: May 8, 2017
Vulnerability identifier: #VU6434
Vulnerability risk: Medium
CVSSv4.0: 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:P/U:Green
CVE-ID: CVE-2017-8804
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Glibc
Glibc
Software vendor:
GNU
GNU
Description
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 in the GNU C Library (aka glibc or libc6). A remote unauthenticated attacker can send a specially crafted UDP request to port 111 (rpcbind) and consume up to 4 gigabytes of memory per request.
Successful exploitation of this vulnerability may result in denial of service (DoS) conditions.
The issue is related to: https://www.cybersecurity-help.cz/vdb/SB2017050801
Remediation
Install patch from vendor's website.