Denial of service in Mozilla NSS

1) Stack-based buffer overflow

EUVDB-ID: #VU68967

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-3479

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the NSS_GetClientAuthData() function in /lib/ssl/authcert.c when accessing gnutls server without a user certificate in the database. A remote attacker can trigger a stack-based buffer overflow and crash the application using the affected library.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla NSS: 3.70 - 3.80

External links

http://bugzilla.mozilla.org/show_bug.cgi?id=1774654
http://bugzilla.redhat.com/show_bug.cgi?id=2134331

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.