Vulnerability CVE-2017-16227
Published: 2017-10-29

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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Quagga -> Quagga 
Debian -> Debian linux 

 References:
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
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