Multiple vulnerabilities in FRRouting (FRR)

Published: 2022-09-13 | Updated: 2023-06-08

Risk	High
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2022-37035 CVE-2022-37032 CVE-2019-25074
CWE-ID	CWE-416 CWE-125 CWE-401
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 is available.
Vulnerable software	frr Other software / Other software solutions
Vendor	frrouting.org

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU67279

Risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-37035

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing BGP packets within the bgp_notify_send_with_data() and bgp_process_packet() function in bgp_packet.c. A remote attacker can send specially crafted BGP packets to the affected daemon, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

frr: 2.0 - 8.3

CPE2.3

External links

https://docs.google.com/document/d/1TqYEcZbFeDTMKe2N4XRFwyAjw_mynIHfvzwbx1fmJj8/edit?usp=sharing
https://github.com/FRRouting/frr/issues/11698

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) Out-of-bounds read

EUVDB-ID: #VU67277

Risk: Medium

CVSSv4.0: 2.9 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green]

CVE-ID: CVE-2022-37032

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition when processing BGP messages. A remote attacker can send specially crafted BGP messages to the system, trigger an out-of-bounds read error and read contents of memory on the system or crash the BGP daemon.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

frr: 2.0 - 8.3

CPE2.3

External links

https://github.com/FRRouting/frr/commit/ff6db1027f8f36df657ff2e5ea167773752537ed
https://bugzilla.suse.com/show_bug.cgi?id=1202023

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. However, proof of concept for this vulnerability is available.

3) Memory leak

EUVDB-ID: #VU67275

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-25074

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when processing IS-IS HELLO packets. A remote attacker can send specially crafted packets to the IS-IS daemon, trigger memory leak and perform denial of service attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

frr: 2.0 - 8.3

CPE2.3

External links

https://github.com/FRRouting/frr/commit/49efc80d342d8e8373c8af040580bd7940808730
https://bugzilla.suse.com/show_bug.cgi?id=1202022

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.