Ubuntu update for NSS

1) Input validation error

EUVDB-ID: #VU23467

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17007

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input within the collect_certs() function in /lib/pkcs7/certread.c in Mozilla NSS library. A remote attacker can supply a specially crafted certificate to the application and perform a denial of service attack.

Mitigation

Update the affected packages.

Ubuntu 19.04

libnss3 - 2:3.42-1ubuntu2.4

Ubuntu 18.04 LTS

libnss3 - 2:3.35-2ubuntu2.6

Ubuntu 16.04 LTS

libnss3 - 2:3.28.4-0ubuntu0.16.04.9

Ubuntu 14.04 ESM

libnss3 - 2:3.28.4-0ubuntu0.14.04.5+esm3

Ubuntu 12.04 ESM

libnss3 - 2:3.28.4-0ubuntu0.12.04.6

Vulnerable software versions

nss (Ubuntu package): 2:3.28.4-0ubuntu0.16.04.1 - 2:3.42-1ubuntu2.3

External links

http://usn.ubuntu.com/4215-1/

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.