Security fix for CVE-2018-1086 and CVE-2018-1079

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has pcs packages installed that are affected by multiple vulnerabilities:

  - Sinatra rack-protection versions 1.5.4 and 2.0.0.rc3 and     earlier contains a timing attack vulnerability in the     CSRF token checking that can result in signatures can be     exposed. This attack appear to be exploitable via     network connectivity to the ruby application. This     vulnerability appears to have been fixed in 1.5.5 and     2.0.0. (CVE-2018-1000119)

  - It was found that the REST interface of the pcsd service     did not properly sanitize the file name from the     /remote/put_file query. If the /etc/booth directory     exists, an authenticated attacker with write permissions     could create or overwrite arbitrary files with arbitrary     data outside of the /etc/booth directory, in the context     of the pcsd process. (CVE-2018-1079)

  - It was found that the REST interface of the pcsd service     did not properly remove the pcs debug argument from the     /run_pcs query, possibly disclosing sensitive     information. A remote attacker with a valid token could     use this flaw to elevate their privilege.
    (CVE-2018-1086)

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

Cedric Buissart from Red Hat discovered an information disclosure bug in pcs, a pacemaker command line interface and GUI. The REST interface normally doesn't allow passing --debug parameter to prevent information leak, but the check wasn't sufficient.

An update for pcs 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.

The pcs packages provide a command-line configuration system for the Pacemaker and Corosync utilities.

Security Fix(es) :

* pcs: Privilege escalation via authorized user malicious REST call (CVE-2018-1079)

* pcs: Debug parameter removal bypass, allowing information disclosure (CVE-2018-1086)

* rack-protection: Timing attack in authenticity_token.rb (CVE-2018-1000119)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

The CVE-2018-1079 issue was discovered by Ondrej Mular (Red Hat) and the CVE-2018-1086 issue was discovered by Cedric Buissart (Red Hat).

Security Fix(es) :

  - pcs: Debug parameter removal bypass, allowing     information disclosure (CVE-2018-1086)

The remote Ubuntu 16.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7614-1 advisory.

    Cedric Buissart discovered that pcs did not correctly handle certain parameters. An attacker could     possibly use this issue to leak sensitive information or elevate their privileges. This issue only     affected Ubuntu 16.04 LTS. (CVE-2018-1086)

    Ondrej Mular discovered that pcs did not correctly handle Unix socket permissions. An attacker could     possibly use this issue to elevate their privileges. This issue only affected Ubuntu 22.04 LTS.
    (CVE-2022-2735)

    It was discovered that pcs did not correctly handle PAM authentication. An attacker could possibly use     this issue to bypass authentication mechanisms. This issue only affected Ubuntu 20.04 LTS and

    Ubuntu 22.04 LTS. (CVE-2022-1049)

    It was discovered that pcs did not correctly handle the validation of Node names. An attacker could     possibly use this issue to execute a cross-site scripting (XSS) attack. This issue only affected Ubuntu     16.04 LTS. (CVE-2017-2661)

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

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
109152	Fedora 26 : pcs (2018-ce5d7106d8)	Nessus	Fedora Local Security Checks	2018/4/19	2024/10/30	high
127219	NewStart CGSL CORE 5.04 / MAIN 5.04 : pcs Multiple Vulnerabilities (NS-SA-2019-0042)	Nessus	NewStart CGSL Local Security Checks	2019/8/12	2021/1/14	high
109003	Debian DSA-4169-1 : pcs - security update	Nessus	Debian Local Security Checks	2018/4/12	2024/11/7	high
110237	CentOS 7 : pcs (CESA-2018:1060)	Nessus	CentOS Local Security Checks	2018/5/31	2024/9/30	high
110889	Scientific Linux Security Update : pcs on SL6.x i386/x86_64 (20180619)	Nessus	Scientific Linux Local Security Checks	2018/7/3	2024/9/6	high
241351	Ubuntu 16.04 LTS / 20.04 LTS / 22.04 LTS : pcs vulnerabilities (USN-7614-1)	Nessus	Ubuntu Local Security Checks	2025/7/4	2025/7/4	high

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