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CVE-2018-12020

7.5 · HIGH

mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and verification actions, which allows remote attackers to spoof the output that GnuPG sends on file descriptor 2…

Published Jun 8, 2018CWE-706EPSS 8.25%

Overview

CVE-2018-12020 is a high-severity vulnerability. It was published on June 8, 2018 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

mainproc.c in GnuPG before 2.2.8 mishandles the original filename during decryption and verification actions, which allows remote attackers to spoof the output that GnuPG sends on file descriptor 2 to other programs that use the "--status-fd 2" option. For example, the OpenPGP data might represent an original filename that contains line feed characters in conjunction with GOODSIG or VALIDSIG status codes.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refopenwall.com/lists/oss-security/2018/06/08/2Refpacketstormsecurity.com/files/152703/Johnny-You-Are-Fired.htmlRefseclists.org/fulldisclosure/2019/Apr/38Refwww.openwall.com/lists/oss-security/2019/04/30/4Refwww.securityfocus.com/bid/104450Refwww.securitytracker.com/id/1041051Refaccess.redhat.com/errata/RHSA-2018:2180Refaccess.redhat.com/errata/RHSA-2018:2181Refdev.gnupg.org/T4012GitHubgithub.com/RUB-NDS/Johnny-You-Are-Fired

How CyberStrike helps

Frequently asked questions

What is CVE-2018-12020?

CVE-2018-12020 is a high-severity vulnerability. It was published on June 8, 2018 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2018-12020?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2018-12020?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2018-12020?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2018-12020 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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