SB2018061165 - Ubuntu update for gnupg, gnupg2
Published: June 11, 2018 Updated: October 30, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Spoofing attack (CVE-ID: CVE-2018-12020)
CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to conduct spoofing attack.
The vulnerability exists due to an input validation flaw in the processing of filenames when displaying the filename. A remote attacker can send a signed and encrypted email message that includes the specially crafted name of the original input file, spoof status messages and fake the verification status of a signed email message.
2) Key management errors (CVE-ID: CVE-2018-9234)
CWE-ID: CWE-320 - Key Management Errors
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The weakness exists due to missing enforcement of a configuration in which key certification requires an offline master Certify key, which results in apparently valid certifications that occurred only with access to a signing subkey. A remote attacker can gain access to potentially sensitive information.
Remediation
Install update from vendor's website.