Bug 455455 (CVE-2008-3432)

Summary:	CVE-2008-3432 vim: heap buffer overflow in mch_expand_wildcards()
Product:	[Other] Security Response	Reporter:	Tomas Hoger <thoger>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	karsten
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2009-01-09 08:36:36 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	453541, 453542, 453543
Bug Blocks:

Description Tomas Hoger 2008-07-15 15:58:35 UTC

Jan Minar's test suite [1] for multiple vim vulnerabilities uncovered an old vim
bug that could trigger a heap buffer overflow in mch_expand_wildcards() in
os_unix.c when file or directory with specially crafted name is opened in vim.

  [1] http://www.rdancer.org/vulnerablevim-netrw.tar.bz2

Issue is caused by incorrect computation of memory requirements for buffer to
store external command executed by vim.  File / directory name is escaped /
quoted before being passed to an external command, however, possible quoting is
not taken into account when allocating memory.

Issue was introduced in 6.2.429:
  http://vim.cvs.sourceforge.net/vim/vim/src/os_unix.c?view=log#rev1.104
  ftp://ftp.vim.org/pub/vim/patches/6.2.429

and fixed upstream in 6.3.059:
  http://vim.cvs.sourceforge.net/vim/vim/src/os_unix.c?view=log#rev1.111
  ftp://ftp.vim.org/pub/vim/patches/6.3/6.3.059

and later re-written for vim 7.0 to use backslash escaping instead of quoting:
  http://vim.cvs.sourceforge.net/vim/vim7/src/os_unix.c?r1=1.49&r2=1.50

For further details, see:
  http://www.openwall.com/lists/oss-security/2008/07/15/4

Comment 1 Tomas Hoger 2008-07-15 15:59:54 UTC

This issue only affects vim packages as shipped in Red Hat Enterprise Linux 3
and 4, which are based on vim 6.3.046.

Comment 3 Red Hat Product Security 2009-01-09 08:36:36 UTC

This issue was addressed in:

Red Hat Enterprise Linux:
  http://rhn.redhat.com/errata/RHSA-2008-0617.html