Use of a broken or risky cryptographic algorithm in gnupg (Alpine package)

1) Use of a broken or risky cryptographic algorithm

EUVDB-ID: #VU31993

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-14855

CWE-ID: CWE-327 - Use of a Broken or Risky Cryptographic Algorithm

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

gnupg (Alpine package): 2.2.3-r0 - 2.2.17-r0

CPE2.3

• cpe:2.3:o:alpine:gnupg_alpine_package:2.2.13-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:gnupg_alpine_package:2.2.14-r0:*:*:*:*:alpine_linux:*:
• cpe:2.3:o:alpine:gnupg_alpine_package:2.2.15-r0:*:*:*:*:alpine_linux:*:

External links

http://git.alpinelinux.org/aports/commit/?id=4fce639e9b4ee255a7ae75426028a65c041daf3d
http://git.alpinelinux.org/aports/commit/?id=e9819d25dc53379d45514e53f91014181e306ec3
http://git.alpinelinux.org/aports/commit/?id=dc810e708ca64228344ca9d249529e253ad1ea71
http://git.alpinelinux.org/aports/commit/?id=94ffa605a4208f620a3f267dd8c13bf7958d1e30

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.