CentOS 6 & 7 update for nss

1) NULL pointer dereference

EUVDB-ID: #VU6841

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-2017-7502

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to NULL pointer dereference error in NSS since 3.24.0 when processing empty SSLv2 messages, received from clients. A remote attacker can send specially crafted request to vulnerable service and perform denial of service attack.

Mitigation

Update the affected package to version nss-3.28.4-3.el6_9 or nss-3.28.4-1.2.el7_3.

Vulnerable software versions

CentOS: 6 - 7

CPE2.3

• cpe:2.3:o:centos_project:centos:6:*:*:*:*:*:*:*
• cpe:2.3:o:centos_project:centos:7:*:*:*:*:*:*:*

External links

https://lists.centos.org/pipermail/centos-announce/2017-May/022449.html
https://lists.centos.org/pipermail/centos-announce/2017-May/022451.html

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.