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authorMaxime Devos <maximedevos@telenet.be>2021-04-03 12:19:10 +0200
committerLudovic Courtès <ludo@gnu.org>2021-04-03 22:09:56 +0200
commit72f911bf059ec3d984dbc2d22e02165940cb9983 (patch)
treed6d9bd49673d5a2a423991b68c22fd3d959f1b40 /etc
parent2161820ebbbab62a5ce76c9101ebaec54dc61586 (diff)
news: Add entry for user account activation vulnerability.
* etc/news.scm: Add entry. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
Diffstat (limited to 'etc')
-rw-r--r--etc/news.scm21
1 files changed, 21 insertions, 0 deletions
diff --git a/etc/news.scm b/etc/news.scm
index 6d7a4a9d4f..9b23c7ca0f 100644
--- a/etc/news.scm
+++ b/etc/news.scm
@@ -13,6 +13,7 @@
;; Copyright © 2021 Leo Famulari <leo@famulari.name>
;; Copyright © 2021 Zhu Zihao <all_but_last@163.com>
;; Copyright © 2021 Chris Marusich <cmmarusich@gmail.com>
+;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
;;
;; Copying and distribution of this file, with or without modification, are
;; permitted in any medium without royalty provided the copyright notice and
@@ -21,6 +22,26 @@
(channel-news
(version 0)
+ (entry (commit "2161820ebbbab62a5ce76c9101ebaec54dc61586")
+ (title
+ (en "Risk of local privilege escalation during user account creation"))
+ (body
+ (en "A security vulnerability that can lead to local privilege
+escalation has been found in the code that creates user accounts on Guix
+System---Guix on other distros is unaffected. The system is only vulnerable
+during the activation of user accounts that do not already exist.
+
+The attack can happen when @command{guix system reconfigure} is running.
+Running @command{guix system reconfigure} can trigger the creation of new user
+accounts if the configuration specifies new accounts. If a user whose account
+is being created manages to log in after the account has been created but
+before ``skeleton files'' have been copied to its home directory, they may, by
+creating an appropriately-named symbolic link in the home directory pointing
+to a sensitive file, such as @file{/etc/shadow}, get root privileges.
+
+See @uref{https://issues.guix.gnu.org/47584} for more information on this
+bug.")))
+
(entry (commit "e52ec6c64a17a99ae4bb6ff02309067499915b06")
(title
(en "New supported platform: powerpc64le-linux")