The installUpdates function in yum-cron/yum-cron.py in yum 3.4.3 and earlier does not properly check the return value of the sigCheckPkg function, which allows remote attackers to bypass the RMP package signing restriction via an unsigned package.

It was discovered that yum-updatesd did not properly perform RPM package signature checks. When yum-updatesd was configured to automatically install updates, a remote attacker could use this flaw to install a malicious update on the target system using an unsigned RPM or an RPM signed with an untrusted key. (CVE-2014-0022)

After installing this update, the yum-updatesd service will be restarted automatically.

The remote Oracle Linux 5 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2014-1004 advisory.

    [1:0.9-6]
    - updatesd: prevent installing unsigned packages.
    - Resolves: rhbz#1125185

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

An updated yum-updatesd package that fixes one security issue is now available for Red Hat Enterprise Linux 5.

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

The yum-updatesd package provides a daemon which checks for available updates and can notify you when they are available via email, syslog, or dbus.

It was discovered that yum-updatesd did not properly perform RPM package signature checks. When yum-updatesd was configured to automatically install updates, a remote attacker could use this flaw to install a malicious update on the target system using an unsigned RPM or an RPM signed with an untrusted key. (CVE-2014-0022)

All yum-updatesd users are advised to upgrade to this updated package, which contains a backported patch to correct this issue. After installing this update, the yum-updatesd service will be restarted automatically.

ID	Name	Product	Family	Severity
77018	Scientific Linux Security Update : yum-updatesd on SL5.x (noarch) (20140805)	Nessus	Scientific Linux Local Security Checks	medium
77008	Oracle Linux 5 : yum- (ELSA-2014-1004)	Nessus	Oracle Linux Local Security Checks	high
77005	CentOS 5 : yum-updatesd (CESA-2014:1004)	Nessus	CentOS Local Security Checks	medium
76997	RHEL 5 : yum-updatesd (RHSA-2014:1004)	Nessus	Red Hat Local Security Checks	medium
73234	Amazon Linux AMI : yum (ALAS-2014-315)	Nessus	Amazon Linux Local Security Checks	medium

Detections

Analytics

CVE-2014-0022

high

Tenable Plugins

medium

high

medium

medium

medium