Regular expression denial of service in Apache ShenYu

1) Incorrect Regular Expression

EUVDB-ID: #VU63330

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-2022-26650

CWE-ID: CWE-185 - Incorrect Regular Expression

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation when processing untrusted input within the Pattern.matches() function in RegexPredicateJudge.java. A remote attacker can pass specially crafted input to the application and perform regular expression denial of service (ReDoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ShenYu: 2.3.0 - 2.4.2

CPE2.3

• cpe:2.3:a:apache_foundation:shenyu:2.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:shenyu:2.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:apache_foundation:shenyu:2.4.1:*:*:*:*:*:*:*

External links

https://seclists.org/oss-sec/2022/q2/110
https://github.com/apache/incubator-shenyu/pull/2975

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.