CVE-2017-7502

Publication date 30 May 2017

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

Null pointer dereference vulnerability in NSS since 3.24.0 was found when server receives empty SSLv2 messages resulting into denial of service by remote attacker.

Status

Package Ubuntu Release Status
nss 17.04 zesty
Fixed 2:3.28.4-0ubuntu0.17.04.2
16.10 yakkety
Fixed 2:3.28.4-0ubuntu0.16.10.2
16.04 LTS xenial
Fixed 2:3.28.4-0ubuntu0.16.04.2
14.04 LTS trusty
Fixed 2:3.28.4-0ubuntu0.14.04.2

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
nss

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references