Use of a broken or risky cryptographic algorithm in GnuPG - CVE-2019-14855

Vulnerability identifier: #VU31993

CSH Severity: Medium

CVSS v4: 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]

CVE-ID: CVE-2019-14855

CWE-ID: CWE-327

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures. This issue affects GnuPG versions before 2.2.18.

GnuPG
DataMosaix Private Cloud
gnupg (Alpine package)
gnupg (Ubuntu package)
gnupg2
gnupg2-debuginfo
gnupg2-debugsource
gnupg2-help
Ubuntu
openEuler

Install update from vendor's website.

DataMosaix Private Cloud - update to 7.09
gnupg (Alpine package) - addressed in versions 2.2.18-r0, 2.2.19-r0
gnupg (Ubuntu package) - update to 2.2.4-1ubuntu1.3
gnupg2 - update to 2.2.17-5.h1
gnupg2-debuginfo - update to 2.2.17-5.h1
gnupg2-debugsource - update to 2.2.17-5.h1
gnupg2-help - update to 2.2.17-5.h1

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855
• https://dev.gnupg.org/T4755
• https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html
• https://rwc.iacr.org/2020/slides/Leurent.pdf

• Use of a broken or risky cryptographic algorithm in GNU GnuPG
• Use of a broken or risky cryptographic algorithm in gnupg (Alpine package)
• openEuler 20.03 LTS update for gnupg2-2.2.17-7
• Multiple vulnerabilities in Rockwell Automation DataMosaix Private Cloud
• Ubuntu update for gnupg2