What is the CVSS score of CVE-2021-39172?

CVE-2021-39172 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 29.2%.

Is there a public PoC exploit available for CVE-2021-39172?

Yes, a public proof-of-concept exploit is available for CVE-2021-39172. Prioritise patching immediately. EPSS: 29.2%.

Is there a patch available for CVE-2021-39172?

Yes, a patch is available for CVE-2021-39172. Update the affected software to the latest version immediately.

Catchet CVE-2021-39172

HIGH

Improper Neutralization of CRLF Sequences ('CRLF Injection') (CWE-93)

2021-08-27 security-advisories@github.com

RCE Catchet

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Aug 27, 2021 - 23:15 nvd

HIGH 8.8

DescriptionNVD

Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving UpdateConfigCommandHandler and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard.

AnalysisAI

Cachet is an open source status page system. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-93. Cachet is an open source status page system. Prior to version 2.5.1, authenticated users, regardless of their privileges (User or Admin), can exploit a new line injection in the configuration edition feature (e.g. mail settings) and gain arbitrary code execution on the server. This issue was addressed in version 2.5.1 by improving UpdateConfigCommandHandler and preventing the use of new lines characters in new configuration values. As a workaround, only allow trusted source IP addresses to access to the administration dashboard. Affected products include: Catchethq Catchet. Version information: version 2.5.1.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.