oss-security - GNU patch out of bounds read, null pointer crash and double free

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20180213120450.29f126cf@pc1>
Date: Tue, 13 Feb 2018 12:04:50 +0100
From: Hanno Böck <hanno@...eck.de>
To: oss-security@...ts.openwall.com
Subject: GNU patch out of bounds read, null pointer crash and double free

The recent release of GNU patch 2.7.6 fixed an old out of bounds read I
had reported in 2015:

out of bounds read with malformed patch in pch_write_line
https://savannah.gnu.org/bugs/index.php?45990

Commit:
https://git.savannah.gnu.org/cgit/patch.git/commit/src/pch.c?id=a0d7fe4589651c64bd16ddaaa634030bb0455866

I re-checked patch now and found a few more issues:

segfault / null pointer (probably crash only)
https://savannah.gnu.org/bugs/index.php?53132
https://git.savannah.gnu.org/cgit/patch.git/commit/?id=f290f48a621867084884bfff87f8093c15195e6a

double free in function another_hunk()
https://savannah.gnu.org/bugs/index.php?53133

-- 
Hanno Böck
https://hboeck.de/

mail/jabber: hanno@...eck.de
GPG: FE73757FA60E4E21B937579FA5880072BBB51E42

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.