Information disclosure in Vim - CVE-2017-17087
Published: December 1, 2017 / Updated: July 17, 2020
Vulnerability identifier: #VU31389
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-17087
CWE-ID: CWE-200
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Vim.org
Affected software:
Vim
Vim
Detailed vulnerability description
The vulnerability allows a local authenticated user to gain access to sensitive information.
fileio.c in Vim prior to 8.0.1263 sets the group ownership of a .swp file to the editor's primary group (which may be different from the group ownership of the original file), which allows local users to obtain sensitive information by leveraging an applicable group membership, as demonstrated by /etc/shadow owned by root:shadow mode 0640, but /etc/.shadow.swp owned by root:users mode 0640, a different vulnerability than CVE-2017-1000382.
How to mitigate CVE-2017-17087
Install update from vendor's website.
Sources
- http://openwall.com/lists/oss-security/2017/11/27/2
- http://security.cucumberlinux.com/security/details.php?id=166
- https://github.com/vim/vim/commit/5a73e0ca54c77e067c3b12ea6f35e3e8681e8cf8
- https://groups.google.com/d/msg/vim_dev/sRT9BtjLWMk/BRtSXNU4BwAJ
- https://lists.debian.org/debian-lts-announce/2019/08/msg00003.html