Bug 1710397 - mutt: invalid format of RFC parameter passed to atoi() function in rfc2231.c could lead to unexpected behavior
Summary: mutt: invalid format of RFC parameter passed to atoi() function in rfc2231.c ...
Keywords:
Status: NEW
Alias: None
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1710398 1711761 1711762
Blocks: 1710399
TreeView+ depends on / blocked
 
Reported: 2019-05-15 13:39 UTC by Marian Rehak
Modified: 2019-09-29 15:13 UTC (History)
9 users (show)

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Description Marian Rehak 2019-05-15 13:39:00 UTC
Invalid format of RFC parameter passed to atoi() function in rfc2231.c could lead to unexpected behavior.

External References:

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=929017

Comment 1 Marian Rehak 2019-05-15 13:39:11 UTC
Created mutt tracking bugs for this issue:

Affects: fedora-all [bug 1710398]

Comment 2 Huzaifa S. Sidhpurwala 2019-05-20 04:34:05 UTC
Analysis:

RFC 2231 (https://tools.ietf.org/html/rfc2231) corresponds to parsing MIME parameters and encoded extensions. The flaw could be exploited by a specially crafted (spam) email header. The effects depend on the value passed to atoi and its implementation.

Testing this on Red Hat Enterprise Linux as follows yields no crash:

[huzaifas@babylon ~]$ cat a.c
#include<stdlib.h>

void main(void)
{
atoi("999999999999999999999999999999");
}
[huzaifas@babylon ~]$ gcc a.c
[huzaifas@babylon ~]$ ./a.out 
[huzaifas@babylon ~]$ 

So its quite possible that the impact is really minimal or a very long string is required to be parsed.

Comment 4 Huzaifa S. Sidhpurwala 2019-05-20 04:52:56 UTC
Upstream patch: https://gitlab.com/muttmua/mutt/commit/3b6f6b829718ec8a7cf3eb6997d86e83e6c38567


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