#VU98776 Resource exhaustion in jwx - CVE-2023-49290

Vulnerability identifier: #VU98776

Vulnerability risk: Medium

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

CVE-ID: CVE-2023-49290

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
jwx
Other software / Other software solutions

Vendor: lestrrat-go

Description

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

The vulnerability occurs when the p2c parameter is set too high in JWE's algorithm PBES2-*. A remote attacker can set the p2c parameter in JWE to a very large number, cause a lot of computational consumption, resulting in a denial of service

Mitigation
Install updates from vendor's website.

Vulnerable software versions

jwx: 0.9.0 - 2.0.17

---

External links
https://github.com/lestrrat-go/jwx/security/advisories/GHSA-7f9x-gw85-8grf
https://github.com/lestrrat-go/jwx/commit/64f2a229b8e18605f47361d292b526bdc4aee01c

---

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.