Bug 70699 - Typo in ports/devel/libedit, possible buffer overflow in libedit/history.c:history_save()
Summary: Typo in ports/devel/libedit, possible buffer overflow in libedit/history.c:hi...
Status: Closed FIXED
Alias: None
Product: Ports & Packages
Classification: Unclassified
Component: Individual Port(s) (show other bugs)
Version: Latest
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-ports-bugs (Nobody)
Depends on:
Reported: 2004-08-20 11:40 UTC by Sergey S. Kostyliov
Modified: 2004-11-22 21:54 UTC (History)
0 users

See Also:


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Description Sergey S. Kostyliov 2004-08-20 11:40:25 UTC
I believe that there is a possible buffer overflow in
libedit/history.c:history_save(). The related code is
mostly common for all *BSD, so please see
for further details.


How-To-Repeat: http://bugs.mysql.com/bug.php?id=4696
Comment 1 Sergey S. Kostyliov 2004-08-21 17:24:20 UTC
Otto Moerbeek <otto@drijf.net>
has just pointed out that the:
        max_size = (len + 1023) & ~1023;
patch is not enough (see http://www.sigmasoft.com/cgi-bin/wilma_hiliter/openbsd-bugs/200408/msg00092.html)

"... If 
len is a multiple of 1024, 

max_size = (len + 1023) & ~1023;

wil not increase it. Should probably be

max_size = (len + 1024) & ~1023;"

It looks like his statement is correct and either his patch or something like:
(which is a bit more intrusive but seems more self documented to me) is needed.

Sergey S. Kostyliov <rathamahata@ehouse.ru>
Jabber ID: rathamahata@jabber.org
Comment 2 Volker Stolz freebsd_committer 2004-09-02 15:02:38 UTC
State Changed
From-To: open->feedback

Could somebody submit the correct patch, please?
Comment 3 Sergey Matveychuk freebsd_committer 2004-11-22 21:54:11 UTC
State Changed
From-To: feedback->closed

Committed, thanks!