CVE-2017-16227
HighSummary
The aspath_put function in Quagga before version 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDATE messages. A flaw in AS_PATH size calculation for long paths counts certain bytes twice, leading to the construction of an invalid message.
Risk Assessment
Attackers can exploit this vulnerability to disrupt BGP services, potentially leading to session drops and network instability.
Recommendation
It is recommended to update Quagga to version 1.2.2 or later to mitigate this vulnerability and to monitor BGP traffic for potential attacks.
Other vulnerabilities in Quagga
See all- CVE-2017-5495High
All versions of Quagga from 0.93 to 1.1.0 are vulnerable to unbounded memory allocation in the telnet 'vty' CLI, leading to Denial-of-Service for Quagga daemons or even the entire host. An attacker can exploit this vulnerability by sending very long strings without a newline.
- CVE-2016-4049High
The bgp_dump_routes_func function in Quagga does not perform size checks when dumping data, which might allow remote attackers to cause a denial of service (assertion failure and daemon crash) via a large BGP packet.
Original NVD description (English source)
The aspath_put function in bgpd/bgp_aspath.c in Quagga before 1.2.2 allows remote attackers to cause a denial of service (session drop) via BGP UPDATE messages, because AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message.