Ubuntu update for Quagga

Published: 2017-10-31

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-16227 CVE-2017-5495
CWE-ID	CWE-20 CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Ubuntu Operating systems & Components / Operating system
Vendor	Canonical Ltd.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Denial of service

EUVDB-ID: #VU10654

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-16227

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The weakness exists in the Quagga BGP daemon due to AS_PATH size calculation for long paths counts certain bytes twice and consequently constructs an invalid message. A remote attacker can іsupply specially crafted BGP UPDATE messages and cause session drop.

Mitigation

Update the affected packages

Ubuntu 17.10:

quagga 1.1.1-3ubuntu0.1

quagga-bgpd 1.1.1-3ubuntu0.1

Ubuntu 17.04:

quagga 1.1.1-1ubuntu0.1

quagga-bgpd 1.1.1-1ubuntu0.1

Ubuntu 16.04 LTS:

quagga 0.99.24.1-2ubuntu1.3

Ubuntu 14.04 LTS:

quagga 0.99.22.4-3ubuntu1.4

Vulnerable software versions

Ubuntu: 14.04 - 17.10

External links

http://www.ubuntu.com/usn/usn-3471-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Memory corruption

EUVDB-ID: #VU10615