CVE-2017-16227

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.

Category

7.5
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.45% Top 25%
Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2017-16227?
CVE-2017-16227 has been scored as a high severity vulnerability.
How to fix CVE-2017-16227?
To fix CVE-2017-16227, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-16227 being actively exploited in the wild?
It is possible that CVE-2017-16227 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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