Integer overflow - CVE-2017-6349

Vulnerability identifier: #VU33447

CSH Severity: High

CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2017-6349

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

An integer overflow at a u_read_undo memory allocation site would occur for vim before patch 8.0.0377, if it does not properly validate values for tree length when reading a corrupted undo file, which may lead to resultant buffer overflows.

Amazon Linux AMI
Gentoo Linux
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
Fedora
neovim (Alpine package)
vim
vim-data
vim-data-common
gvim
gvim-debuginfo
vim-debuginfo
vim-debugsource

Install update from vendor's website.

vim - addressed in versions 8.0.386-1.fc24, 8.0.386-1.fc25
vim-data - update to 9.0.0814-17.9.1
vim-data-common - update to 9.0.0814-17.9.1
gvim - update to 9.0.0814-17.9.1
gvim-debuginfo - update to 9.0.0814-17.9.1
vim - update to 9.0.0814-17.9.1
vim-debuginfo - update to 9.0.0814-17.9.1
vim-debugsource - update to 9.0.0814-17.9.1

• http://www.securityfocus.com/bid/96451
• http://www.securitytracker.com/id/1037949
• https://github.com/vim/vim/commit/3eb1637b1bba19519885dd6d377bd5596e91d22c
• https://groups.google.com/forum/#!topic/vim_dev/LAgsTcdSfNA
• https://groups.google.com/forum/#!topic/vim_dev/QPZc0CY9j3Y
• https://security.gentoo.org/glsa/201706-26
• https://usn.ubuntu.com/4309-1/

• Integer overflow in neovim (Alpine package)
• Amazon Linux AMI update for vim
• Gentoo update for Vim, gVim
• SUSE update for vim
• Fedora 24 update for vim
• Fedora 25 update for vim