import UBI emacs-27.2-10.el9_4

This commit is contained in:
eabdullin 2024-09-09 20:53:29 +00:00
parent 3f0799447b
commit 443cbf996b
2 changed files with 78 additions and 4 deletions

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@ -0,0 +1,68 @@
From f4cc61636947b5c2f0afc67174dd369fe3277aa8 Mon Sep 17 00:00:00 2001
From: Ihor Radchenko <yantar92@posteo.net>
Date: Tue, 18 Jun 2024 13:06:44 +0200
Subject: org-link-expand-abbrev: Do not evaluate arbitrary unsafe Elisp code
* lisp/org/ol.el (org-link-expand-abbrev): Refuse expanding %(...) link
abbrevs that specify unsafe function. Instead, display a warning, and
do not expand the abbrev. Clear all the text properties from the
returned link, to avoid any potential vulnerabilities caused by
properties that may contain arbitrary Elisp.
---
lisp/org/ol.el | 40 +++++++++++++++++++++++++++++-----------
1 file changed, 29 insertions(+), 11 deletions(-)
diff --git a/lisp/org/ol.el b/lisp/org/ol.el
index 7a7f4f5..8a556c7 100644
--- a/lisp/org/ol.el
+++ b/lisp/org/ol.el
@@ -1152,17 +1152,35 @@ Abbreviations are defined in `org-link-abbrev-alist'."
(if (not as)
link
(setq rpl (cdr as))
- (cond
- ((symbolp rpl) (funcall rpl tag))
- ((string-match "%(\\([^)]+\\))" rpl)
- (replace-match
- (save-match-data
- (funcall (intern-soft (match-string 1 rpl)) tag))
- t t rpl))
- ((string-match "%s" rpl) (replace-match (or tag "") t t rpl))
- ((string-match "%h" rpl)
- (replace-match (url-hexify-string (or tag "")) t t rpl))
- (t (concat rpl tag)))))))
+ ;; Drop any potentially dangerous text properties like
+ ;; `modification-hooks' that may be used as an attack vector.
+ (substring-no-properties
+ (cond
+ ((symbolp rpl) (funcall rpl tag))
+ ((string-match "%(\\([^)]+\\))" rpl)
+ (let ((rpl-fun-symbol (intern-soft (match-string 1 rpl))))
+ ;; Using `unsafep-function' is not quite enough because
+ ;; Emacs considers functions like `genenv' safe, while
+ ;; they can potentially be used to expose private system
+ ;; data to attacker if abbreviated link is clicked.
+ (if (or (eq t (get rpl-fun-symbol 'org-link-abbrev-safe))
+ (eq t (get rpl-fun-symbol 'pure)))
+ (replace-match
+ (save-match-data
+ (funcall (intern-soft (match-string 1 rpl)) tag))
+ t t rpl)
+ (org-display-warning
+ (format "Disabling unsafe link abbrev: %s
+You may mark function safe via (put '%s 'org-link-abbrev-safe t)"
+ rpl (match-string 1 rpl)))
+ (setq org-link-abbrev-alist-local (delete as org-link-abbrev-alist-local)
+ org-link-abbrev-alist (delete as org-link-abbrev-alist))
+ link
+ )))
+ ((string-match "%s" rpl) (replace-match (or tag "") t t rpl))
+ ((string-match "%h" rpl)
+ (replace-match (url-hexify-string (or tag "")) t t rpl))
+ (t (concat rpl tag))))))))
(defun org-link-open (link &optional arg)
"Open a link object LINK.
--
cgit v1.1

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@ -5,7 +5,7 @@ Summary: GNU Emacs text editor
Name: emacs
Epoch: 1
Version: 27.2
Release: 9%{?dist}
Release: 10%{?dist}
License: GPLv3+ and CC0-1.0
URL: http://www.gnu.org/software/emacs/
Source0: https://ftp.gnu.org/gnu/emacs/emacs-%{version}.tar.xz
@ -33,6 +33,8 @@ Patch6: emacs-etags-local-command-injection-vulnerability.patch
Patch7: emacs-htmlfontify-command-injection-vulnerability.patch
Patch8: emacs-ruby-mode-local-command-injection-vulnerability.patch
Patch9: emacs-ob-latex-command-injection-vulnerability.patch
Patch10: emacs-org-link-expand-abbrev-unsafe-elisp.patch
BuildRequires: gcc
BuildRequires: atk-devel
BuildRequires: cairo-devel
@ -75,7 +77,6 @@ BuildRequires: jansson-devel
BuildRequires: systemd-devel
BuildRequires: gtk3-devel
BuildRequires: webkit2gtk3-devel
BuildRequires: gnupg2
@ -201,6 +202,7 @@ Development header files for Emacs.
%patch7 -p1 -b .htmlfontify-command-injection-vulnerability
%patch8 -p1 -b .ruby-mode-local-command-injection-vulnerability
%patch9 -p1 -b .ob-latex-command-injection-vulnerability
%patch10 -p1 -b .org-link-expand-abbrev-unsafe-elisp
autoconf
# We prefer our emacs.desktop file
@ -253,7 +255,7 @@ ln -s ../configure .
%configure --with-dbus --with-gif --with-jpeg --with-png --with-rsvg \
--with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3 --with-gpm=no \
--with-xwidgets --with-modules --with-harfbuzz --with-cairo --with-json
--with-modules --with-harfbuzz --with-cairo --with-json
make bootstrap
%{setarch} %make_build
cd ..
@ -491,7 +493,11 @@ rm %{buildroot}%{_datadir}/icons/hicolor/scalable/mimetypes/emacs-document23.svg
%{_includedir}/emacs-module.h
%changelog
* Sun Apr 2 2023 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-9
* Fri Aug 23 2024 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-10
- org-link-expand-abbrev: Do not evaluate arbitrary unsafe Elisp code (CVE-2024-39331)
- Disable xwidgets (RHEL-33447)
* Sun Apr 02 2023 Jacek Migacz <jmigacz@redhat.com> - 1:27.2-9
- Fix etags local command injection vulnerability (#2175190)
- Fix htmlfontify.el command injection vulnerability (#2175179)
- Fix ruby-mode.el local command injection vulnerability (#2175142)