Vulnerability identifier: #VU21407
Vulnerability risk: High
CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]
CVE-ID:
CWE-ID:
CWE-121
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
BIRD Internet Routing Daemon
Server applications /
Other server solutions
Vendor: CZ.NIC Labs
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system or perform denial of service attack.
The vulnerability exists due to a boundary error when checking validity of BGP administrative shutdown communication messages. A remote unauthenticated attacker can send a specially crafted administrative shutdown communication message, trigger a four-byte stack-based buffer overflow and perform denial of service attack or execute arbitrary code on the target system.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
BIRD Internet Routing Daemon: 1.6.0 - 2.0.5
External links
https://bird.network.cz
https://trubka.network.cz/pipermail/bird-users/2019-September/013718.html
https://trubka.network.cz/pipermail/bird-users/2019-September/013720.html
https://trubka.network.cz/pipermail/bird-users/2019-September/013722.html
https://gitlab.labs.nic.cz/labs/bird/commit/1657c41c96b3c07d9265b07dd4912033ead4124b
https://gitlab.labs.nic.cz/labs/bird/commit/8388f5a7e14108a1458fea35bfbb5a453e2c563c
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.