Date: Tue, 22 Nov 2016 11:19:15 -0500 From: James McCoy <jamessan@...ian.org> To: oss-security@...ts.openwall.com Subject: vim/neovim: Arbitrary command execution (CVE-2016-1248) Hi all, CVE-2016-1248 was assigned for a vulnerability in Vim which would allow arbitrary shell commands to be run if a user opened a file with a malicious modeline. This is due to lack of validation of values for a few options. Those options' values are then used in Vim's scripts to build a command string that's evaluated by :execute, which is what allows the shell commands to be run. This has been fixed in Vim by patch 8.0.0056[0], and new Windows builds of Vim have been published with the fix, however the implications have not yet been disclosed. Since Neovim shares this code, it is also vulnerable. It is fixed by commit 4fad66f[1], but has not yet had a release. This affects Vim at least as far back as 7.0. I didn't check any older versions. This affects all released versions of Neovim. Thanks to Florian Larysch for discovering this issue. [0]: https://github.com/vim/vim/releases/tag/v8.0.0056 [1]: https://github.com/neovim/neovim/commit/4fad66fbe637818b6b3d6bc5d21923ba72795040 Cheers, -- James GPG Key: 4096R/91BF BF4D 6956 BD5D F7B7 2D23 DFE6 91AE 331B A3DB View attachment "vim_CVE-2016-1248.patch" of type "text/x-diff" (3946 bytes) text/x-diff View attachment "neovim_CVE-2016-1248.patch" of type "text/x-diff" (4088 bytes) text/x-diff Download attachment "signature.asc" of type "application/pgp-signature" (964 bytes) application/pgp-signature

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