A data validation flaw was found in the way gnupg processes file names during decryption and signature validation. An attacker may be able to inject messages into gnupg verbose message logging which may have the potential to bypass the integrity of signature authentication mechanisms and could have other unintended consequences if applications take action(s) based on parsed verbose gnupg output.
Find out more about CVE-2018-12020 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having a security impact of Important, and a future update may address this flaw.
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | High |
| Availability Impact | None |
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat Enterprise Linux 6 (gnupg2) | RHSA-2018:2180 | 2018-07-11 |
| Red Hat Enterprise Linux 7 (gnupg2) | RHSA-2018:2181 | 2018-07-11 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux 5 | gnupg | Will not fix |
| Red Hat Enterprise Linux 5 | gnupg2 | Will not fix |
This flaw can be mitigated by appending the --no-verbose command line flag.
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