Bug 855029 (CVE-2012-4409) - CVE-2012-4409 mcrypt: buffer overflow when processing encrypted file headers
Summary: CVE-2012-4409 mcrypt: buffer overflow when processing encrypted file headers
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2012-4409
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 855030 855031
Blocks:
TreeView+ depends on / blocked
 
Reported: 2012-09-06 14:31 UTC by Vincent Danen
Modified: 2019-09-29 12:55 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2019-06-10 10:59:16 UTC
Embargoed:

Attachments (Terms of Use)

Description Vincent Danen 2012-09-06 14:31:45 UTC 
A buffer overflow was reported [1],[2] in mcrypt version 2.6.8 and earlier due to a boundary error in the processing of an encrypted file (via the check_file_head() function in src/extra.c).  If a user were tricked into attempting to decrypt a specially-crafted .nc encrypted flie, this flaw would cause a stack-based buffer overflow that could potentially lead to arbitrary code execution.

Note that this is caught by FORTIFY_SOURCE, which renders this to being a crash-only bug on Fedora.

There is currently no upstream patches for this flaw.

[1] https://secunia.com/advisories/50507/
[2] https://bugs.gentoo.org/show_bug.cgi?id=434112
Comment 1 Vincent Danen 2012-09-06 14:33:38 UTC 
Created mcrypt tracking bugs for this issue

Affects: fedora-all [bug 855030]
Affects: epel-all [bug 855031]
Comment 2 Vincent Danen 2012-09-06 14:38:04 UTC 
CVE requested:

http://www.openwall.com/lists/oss-security/2012/09/06/1
Comment 3 Vincent Danen 2012-09-06 20:37:24 UTC 
CVE-2012-4409 assigned:

http://www.openwall.com/lists/oss-security/2012/09/06/4
Comment 4 Vincent Danen 2012-09-06 20:43:53 UTC 
Preliminary patches and further info are here:

http://www.openwall.com/lists/oss-security/2012/09/06/8

It also has a fix for some format string issues as well, which should be applied as well.
Comment 5 Fedora Update System 2012-09-17 22:15:55 UTC 
mcrypt-2.6.8-9.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Fedora Update System 2012-09-19 03:11:01 UTC 
mcrypt-2.6.8-9.fc16 has been pushed to the Fedora 16 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 7 Fedora Update System 2012-09-24 21:31:19 UTC 
mcrypt-2.6.8-9.el5 has been pushed to the Fedora EPEL 5 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 8 Fedora Update System 2012-09-24 21:31:52 UTC 
mcrypt-2.6.8-9.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2012-09-26 09:13:57 UTC 
mcrypt-2.6.8-9.fc17 has been pushed to the Fedora 17 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 10 Product Security DevOps Team 2019-06-10 10:59:16 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
Note You need to log in before you can comment on or make changes to this bug.