CVE-2017-16227 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Reference

http://download.savannah.gnu.org/releases/quagga/quagga-1.2.2.changelog.txt http://www.debian.org/security/2017/dsa-4011 https://bugs.debian.org/879474 https://git.savannah.gnu.org/cgit/quagga.git/commit/?id=7a42b78be9a4108d98833069a88e6fddb9285008 https://lists.quagga.net/pipermail/quagga-dev/2017-September/033284.html

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5