CVE-2017-5495

描述

All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.

如何修補 CVE-2017-5495

要修補 CVE-2017-5495,請將受影響套件升級到下列已修補版本。

• —升級至 1.1.1-r0 或更新版本

CVE-2017-5495 正在被利用嗎?

中等 — EPSS 為 18.8%,可持續追蹤但非最高優先。

受影響套件(1)

• from 0, < 1.1.1-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2017-5495