CVE-2017-17790

HIGH

Description

The lazy_initialize function in lib/resolv.rb in Ruby through 2.4.3 uses Kernel#open, which might allow Command Injection attacks, as demonstrated by a Resolv::Hosts::new argument beginning with a '|' character, a different vulnerability than CVE-2017-17405. NOTE: situations with untrusted input may be highly unlikely.

References

https://access.redhat.com/errata/RHSA-2018:0378

https://access.redhat.com/errata/RHSA-2018:0583

https://access.redhat.com/errata/RHSA-2018:0584

https://access.redhat.com/errata/RHSA-2018:0585

https://github.com/ruby/ruby/pull/1777

https://lists.debian.org/debian-lts-announce/2017/12/msg00024.html

https://lists.debian.org/debian-lts-announce/2017/12/msg00025.html

https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html

https://www.debian.org/security/2018/dsa-4259

Details

Source: MITRE

Published: 2017-12-20

Updated: 2018-08-03

Type: CWE-74

Risk Information

CVSS v2.0

Base Score: 7.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 10

Severity: HIGH

CVSS v3.0

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 3.9

Severity: CRITICAL