[<prev] [next>] [day] [month] [year] [list]
Message-ID: <YL4HIzhrA7I83MF0@ugly>
Date: Mon, 7 Jun 2021 13:46:43 +0200
From: Oswald Buddenhagen <oswald.buddenhagen@....de>
To: isync-devel@...ts.sourceforge.net
Cc: oss-security@...ts.openwall.com
Subject: CVE-2021-3578: possible remote code execution in isync/mbsync
description:
A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked
pointer cast allows a malicious or compromised server to write an
arbitrary integer value past the end of a heap-allocated structure by
issuing an unexpected APPENDUID response. This could be plausibly
exploited for remote code execution on the client.
mitigation:
upgrade to the freshly released v1.3.6 or v1.4.2 available from
https://sourceforge.net/projects/isync/files/isync/ , or apply the
matching attached patch.
credit:
This problem was found by Lukas Braun <koomi@...hbit.net> using a
fuzzer.
View attachment "fix-handling-of-unexpected-APPENDUID-response-code--1.3.patch" of type "text/x-diff" (3187 bytes)
View attachment "fix-handling-of-unexpected-APPENDUID-response-code--1.4.patch" of type "text/x-diff" (3167 bytes)
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
