Permissions, Privileges, and Access Controls in putty (Alpine package)

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU21597

Risk: Medium

CVSSv3.1: 5.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-17068

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to an error with "bracketed paste mode" protection implementation. A remote attacker can affect current user's session with a malicious clipboard content and execute arbitrary commands on a remote system with privileges of the current user.

Mitigation

Install update from vendor's website.

Vulnerable software versions

putty (Alpine package): 0.60-r0 - 0.71-r1

External links

http://git.alpinelinux.org/aports/commit/?id=25b4361bdc9f4c39a1e66d492117f90e6701832b
http://git.alpinelinux.org/aports/commit/?id=8d7092356e7b101ff1c39be6009da6297e5aa418
http://git.alpinelinux.org/aports/commit/?id=cee3cd28a75386eb0461f2355237396c014c6a8e
http://git.alpinelinux.org/aports/commit/?id=d21e62f341aa3be70aa5dc967aeebdf6a54e04d2

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.