RHEL 7 : log4j (RHSA-2017:2423)

critical Nessus Plugin ID 102348
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

An update for log4j is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Log4j is a tool to help the programmer output log statements to a variety of output targets.

Security Fix(es) :

* It was found that when using remote logging with log4j socket server the log4j server would deserialize any log event received via TCP or UDP. An attacker could use this flaw to send a specially crafted log event that, during deserialization, would execute arbitrary code in the context of the logger application. (CVE-2017-5645)

Solution

Update the affected log4j, log4j-javadoc and / or log4j-manual packages.

See Also

https://access.redhat.com/errata/RHSA-2017:2423

https://access.redhat.com/security/cve/cve-2017-5645

https://access.redhat.com/security/cve/cve-2019-17571

Plugin Details

Severity: Critical

ID: 102348

File Name: redhat-RHSA-2017-2423.nasl

Version: 3.15

Type: local

Agent: unix

Published: 8/10/2017

Updated: 5/8/2020

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:log4j, p-cpe:/a:redhat:enterprise_linux:log4j-javadoc, p-cpe:/a:redhat:enterprise_linux:log4j-manual, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:7.4, cpe:/o:redhat:enterprise_linux:7.5, cpe:/o:redhat:enterprise_linux:7.6, cpe:/o:redhat:enterprise_linux:7.7

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 8/7/2017

Vulnerability Publication Date: 4/17/2017

Reference Information

CVE: CVE-2017-5645, CVE-2019-17571

RHSA: 2017:2423

IAVA: 2020-A-0008-S