What is the CVSS score of CVE-2021-33477?

CVE-2021-33477 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: 4.0%.

Is there a public PoC exploit available for CVE-2021-33477?

Yes, a public proof-of-concept exploit is available for CVE-2021-33477. Prioritise patching immediately. EPSS: 4.0%.

Is there a patch available for CVE-2021-33477?

Yes, a patch is available for CVE-2021-33477. Update the affected software to the latest version immediately.

Eterm CVE-2021-33477

HIGH

Improper Handling of Exceptional Conditions (CWE-755)

2021-05-20 cve@mitre.org

RCE Eterm Mrxvt Rxvt Unicode Rxvt Fedora Debian Linux

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

May 20, 2021 - 20:15 nvd

HIGH 8.8

DescriptionNVD

rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.

AnalysisAI

rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available.

Technical ContextAI

This vulnerability is classified under CWE-755. rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline. Affected products include: Eterm Project Eterm, Mrxvt Project Mrxvt, Rxvt-Unicode Project Rxvt-Unicode, Rxvt Project Rxvt, Fedoraproject Fedora.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.