CVE-2019-14855 - Use of a Broken or Risky Cryptographic Algorithm

Severity

75%

Complexity

39%

Confidentiality

60%

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.

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 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N).

Demo Examples

Use of a Broken or Risky Cryptographic Algorithm

CWE-327

These code examples use the Data Encryption Standard (DES).


               
EVP_des_ecb();

               
des.initEncrypt(key2);

               
}
return $encryptedPassword;

Once considered a strong algorithm, DES now regarded as insufficient for many applications. It has been replaced by Advanced Encryption Standard (AES).

Overview

Type

Fedora

First reported 4 years ago

2020-03-20 16:15:00

Last updated 4 years ago

2020-03-24 20:14:00

Affected Software

Fedora 30

30

Fedora 31

31

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14855

Issue Tracking, Third Party Advisory

https://dev.gnupg.org/T4755

Vendor Advisory

https://lists.gnupg.org/pipermail/gnupg-announce/2019q4/000442.html

Mailing List, Release Notes, Vendor Advisory

https://rwc.iacr.org/2020/slides/Leurent.pdf

Exploit, Third Party Advisory

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