Description
pcs before versions 0.9.164 and 0.10 is vulnerable to a debug parameter removal bypass. 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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| redhat | pcs | pcs 0.9.164, pcs 0.10 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | pcs | 0.9.164-1 | — |
| Debian 13 | pcs | 0.9.164-1 | — |
| Debian 12 | pcs | 0.9.164-1 | — |
| Debian 9 | pcs | 0.9.155+dfsg-2+deb9u1 | DSA-4169-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | pcs | 0.10.11-2ubuntu3+esm1 | USN-7614-1 |
| Ubuntu Pro 20.04 LTS | pcs | 0.10.4-3ubuntu0.1~esm1 | USN-7614-1 |
| Ubuntu Pro 16.04 LTS | pcs | 0.9.149-1ubuntu1.1+esm1 | USN-7614-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | pcs +1 | 0.9.162-5.el7_5.1 | RHSA-2018:1060 |
| RHEL 6 | pcs | 0.9.155-3.el6 | RHSA-2018:1927 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | pcs +1 | 0.9.162-5.amzn2.1.1 | ALAS2-2018-1005 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | pcs +1 | 0.9.162-5.0.3.el7_5.1 | ELSA-2018-1060 |
Advisories 6
- RHSA-2018:1927 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- RHSA-2018:1060 Red Hat Security Advisory: pcs security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-7614-1 pcs vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4169-1 pcs - security update Debian Security (DSA / DLA) · Mar 9, 2026
- ELSA-2018-1060 Important: pcs security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Apr 30, 2018
- ALAS2-2018-1005 Important: pcs security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 26, 2018
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-1086
- RHSA-2018:1060 vendor-advisory
- RHSA-2018:1927 vendor-advisory
- DSA-4169 vendor-advisory