Bug 1770900 (CVE-2019-14855) - CVE-2019-14855 gnupg2: OpenPGP Key Certification Forgeries with SHA-1
Summary: CVE-2019-14855 gnupg2: OpenPGP Key Certification Forgeries with SHA-1
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2019-14855
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1815379 1815380
Blocks: 1759069
TreeView+ depends on / blocked
 
Reported: 2019-11-11 13:18 UTC by Marian Rehak
Modified: 2022-10-02 21:49 UTC (History)
6 users (show)

Fixed In Version: gnupg2 2.2.18
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in OpenPGP Key Certification Forgeries in the way certificate signatures could be forged by using collisions found in the SHA-1 algorithm. An attacker could use this weakness to create forged certificate signatures.
Clone Of:
Environment:
Last Closed: 2020-03-20 10:31:46 UTC
Embargoed:

Attachments (Terms of Use)

Description Marian Rehak 2019-11-11 13:18:28 UTC 
OpenPGP Key Certification Forgeries with SHA-1. Older versions of OpenPGP implementations will default to using SHA-1 which is not secure.
Comment 1 Huzaifa S. Sidhpurwala 2020-03-20 05:12:43 UTC 
Acknowledgments:

Name: Werner Koch (GnuPG project)
Comment 2 Huzaifa S. Sidhpurwala 2020-03-20 05:12:47 UTC 
Statement:

This flaw only affects the versions of GnuPG package which defaults to signing with SHA-1. GnuPG 2.0 and above does not use SHA-1 by default therefore are not directly affected by this flaw.
Comment 3 Huzaifa S. Sidhpurwala 2020-03-20 05:12:52 UTC 
External References:

https://rwc.iacr.org/2020/slides/Leurent.pdf
Comment 4 Huzaifa S. Sidhpurwala 2020-03-20 05:24:01 UTC 
Created gnupg1 tracking bugs for this issue:

Affects: fedora-30 [bug 1815379]
Affects: fedora-31 [bug 1815380]
Comment 5 Product Security DevOps Team 2020-03-20 10:31:46 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-14855
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