HOMEVULNERABILITIESCVE-2020-35459
HIGH

CVE-2020-35459

CWE-78Published: January 12, 2021· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official Description

An issue was discovered in ClusterLabs crmsh through 4.2.1. Local attackers able to call "crm history" (when "crm" is run) were able to execute commands via shell code injection to the crm history commandline, potentially allowing escalation of privileges.

NVD Source

Technical Analysis

CVE-2020-35459 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

clusterlabs1 product(s)
crmsh
Debian1 product(s)
debian linux
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2021/01/12/3
PATCHhttps://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476
PATCHhttp://www.openwall.com/lists/oss-security/2021/01/12/3
PATCHhttps://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476
ADVISORYhttps://bugzilla.suse.com/show_bug.cgi?id=1179999
ADVISORYhttps://github.com/ClusterLabs/crmsh/releases
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/01/msg00021.html
ADVISORYhttps://www.openwall.com/lists/oss-security/2021/01/12/3
ADVISORYhttps://bugzilla.suse.com/show_bug.cgi?id=1179999
ADVISORYhttps://github.com/ClusterLabs/crmsh/releases
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/01/msg00021.html
ADVISORYhttps://www.openwall.com/lists/oss-security/2021/01/12/3

All References (12)

→
http://www.openwall.com/lists/oss-security/2021/01/12/3Mailing List · Patch · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=1179999Issue Tracking · Third Party Advisory
→
https://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476Patch · Third Party Advisory
→
https://github.com/ClusterLabs/crmsh/releasesRelease Notes · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00021.htmlMailing List · Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2021/01/12/3Exploit · Mailing List · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/01/12/3Mailing List · Patch · Third Party Advisory
→
https://bugzilla.suse.com/show_bug.cgi?id=1179999Issue Tracking · Third Party Advisory
→
https://github.com/ClusterLabs/crmsh/blob/a403aa15f3ea575adfe5e43bf2a31c9f9094fcda/crmsh/history.py#L476Patch · Third Party Advisory
→
https://github.com/ClusterLabs/crmsh/releasesRelease Notes · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2021/01/msg00021.htmlMailing List · Third Party Advisory
→
https://www.openwall.com/lists/oss-security/2021/01/12/3Exploit · Mailing List · Third Party Advisory

Quick Facts

CVE IDCVE-2020-35459
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-78
CISA KEVNo
Affected2 vendor(s)
PublishedJan 12, 2021

Related CVEs (CWE-78)

CVE-2014-9727
10.0
CVE-2014-1982
10.0
CVE-2021-33032
10.0
CVE-2023-2564
10.0
CVE-2023-3572
10.0
CVE-2013-5486
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-35459 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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