#VU66731 NULL pointer dereference in LiteSpeed QUIC - CVE-2022-30592

Vulnerability identifier: #VU66731

Vulnerability risk: Medium

CVSSv4.0: 7.7 [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:P/U:Green]

CVE-ID: CVE-2022-30592

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
LiteSpeed QUIC
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: LiteSpeed Technologies

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error within liblsquic/lsquic_qenc_hdl.c when handling HTTP/3 requests. A remote attacker can send multiple requests to the server and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

LiteSpeed QUIC: 1.0 - 3.0.4

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External links
https://github.com/litespeedtech/lsquic/commit/a74702c630e108125e71898398737baec8f02238#diff-73a138506faffe5f1efa8586346ab573c88e9dd2097774ecca5949a718a57cae
https://github.com/litespeedtech/lsquic/releases/tag/v3.1.0

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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.