oss-sec mailing list archives
Re: Security flaw in GNU Emacs file-local variables
From: Kurt Seifried <kseifried () redhat com>
Date: Sun, 12 Aug 2012 23:42:36 -0600
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 08/12/2012 09:22 PM, Chong Yidong wrote:
Paul Ling has found a security flaw in the file-local variables code in GNU Emacs. We are preparing a new Emacs release to address this flaw, and would like to request a CVE. When the Emacs user option `enable-local-variables' is set to `:safe' (the default value is t), Emacs should automatically refuse to evaluate `eval' forms in file-local variable sections. Due to the bug, Emacs instead automatically evaluates such `eval' forms. Thus, if the user changes the value of `enable-local-variables' to `:safe', visiting a malicious file can cause automatic execution of arbitrary Emacs Lisp code with the permissions of the user. The bug is present in Emacs 23.2, 23.3, 23.4, and 24.1. Attached are patches to fix this bug for Emacs 23.4 and Emacs 24.1, written by Glenn Morris. (The 23.4 patch should apply to the rest of the Emacs 23.x series.) Bug tracker ref: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=12155
Please use CVE-2012-3479 for this issue. - -- Kurt Seifried Red Hat Security Response Team (SRT) PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQIcBAEBAgAGBQJQKJPMAAoJEBYNRVNeJnmTfa8QAMp9laqz/ihbWisZWmHk5kkQ 1afhhPxgSOauIPnuc2myWIP53lu8buJOgXOCo1Tl6fvfjMGu8zWJ3gr3xnqRyYjr m1EbiUZtrqdlyukvkReU08CVWmW8lXkn6W3znc3S6JQNq+eRxgBXMvcbAtNnJzKA ri6ApmMIqKZkbV9p8hqyHeNcdCdfi4nrjBr4vff6UX4SM1hqe05P6DOa8FCoRDIj Wt81d3zUenGwuVyFaRknuqw0dwQ6svwjCpcpsZnEiwjPZG+8IDlo8aCrvuThKh+x DTcD3Lt8Vr7+6QhAf7a20PDwJvM1KcinkHDQ1qE6ZvmxcdTJmoY0R+2wZqdnX2UZ f7mlqS8GPxH4V173ypz98eM0IhI/E4ZXSlTHg0vThq33QJ9NNjQ0OuDJhM5fuikF vY/s2n2TymrEAIjP6CMwZjZfSe56SzcJadR3Pq56H7RD+zSJYJmfasWbK56acjHA qE5xxvunO7UZPMAsYqUMGIqVCv5EsiDmmoFF/Xtlk98/at8AWfKNt27IGqPU+io3 ShpGjDcptN8yitOPaPcEaAim6ndfObL4LlLozNv85M71oJ7tcDGiVBPaPRIjB0AJ bXpunXMcEigQlazVy/T4CIv7r2P2ZR64at16t0LKiR4XiTL016rjUkhSuHdPSdU3 FS+YTLukIBYRDIFbbJss =jFS2 -----END PGP SIGNATURE-----
Current thread:
- Security flaw in GNU Emacs file-local variables Chong Yidong (Aug 12)
- Re: Security flaw in GNU Emacs file-local variables Kurt Seifried (Aug 12)