Information disclosure in FRRouting

1) Information disclosure

EUVDB-ID: #VU97714

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-15865

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to an error when handling attribute length in BPG packets. A remote attacker can send a malformed BGP UPDATE packet from a connected peer and trigger transmission of up to a few thousand unintended bytes.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

frr: 2.0 - 3.0.1

CPE2.3

• cpe:2.3:a:frrouting.org:frr:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:frrouting.org:frr:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:frrouting.org:frr:3.0:*:*:*:*:*:*:*

External links

https://lists.cumulusnetworks.com/pipermail/cumulus-security-announce/2017-November/000009.html
https://support.cumulusnetworks.com/hc/en-us/articles/115014754307#rn690
https://support.cumulusnetworks.com/hc/en-us/articles/115014778107-CVE-2017-15865-Malformed-BGP-UPDATE-Triggers-Information-Disclosure

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.