High severity · published Mar 20, 2020
CVE-2019-14855
A flaw was found in the way certificate signatures could be forged using collisions found in the SHA-1 algorithm
7.5
CVSS
1.1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.1% · higher than 65% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
30; 31 · source: NVD
GN
Gnupg · Gnupg
before 2.2.18 · source: NVD
UL
Ubuntu Linux · Canonical
18.04 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-14855
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-14855
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855
Vendor Advisory
https://dev.gnupg.org/T4755
Mailing List
https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html
Exploit
https://rwc.iacr.org/2020/slides/Leurent.pdf
Third Party Advisory
https://usn.ubuntu.com/4516-1/
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