Bug 1396383 (CVE-2016-9401) - CVE-2016-9401 bash: popd controlled free
Summary: CVE-2016-9401 bash: popd controlled free
Status: NEW
Alias: CVE-2016-9401
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=low,public=20161117,reported=2...
Keywords: Reopened, Security
Depends On: 1396387 1400793 1429838
Blocks: 1386080 1396388
TreeView+ depends on / blocked
 
Reported: 2016-11-18 08:52 UTC by Andrej Nemec
Modified: 2018-03-29 22:02 UTC (History)
9 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A denial of service flaw was found in the way bash handled popd commands. A poorly written shell script could cause bash to crash resulting in a local denial of service limited to a specific bash session.
Story Points: ---
Clone Of:
Environment:
Last Closed: 2016-11-29 06:09:46 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:0725 normal SHIPPED_LIVE Moderate: bash security and bug fix update 2017-03-21 12:42:42 UTC
Red Hat Product Errata RHSA-2017:1931 normal SHIPPED_LIVE Moderate: bash security and bug fix update 2017-08-01 18:26:59 UTC

Description Andrej Nemec 2016-11-18 08:52:56 UTC
A vulnerability was found in popd. It can be tricked to free a user supplied address in the following way:

$ popd +-111111

This could be used to bypass restricted shells (rsh) on some environments to cause use-after-free.

References:

http://seclists.org/oss-sec/2016/q4/445

Comment 1 Andrej Nemec 2016-11-18 08:55:33 UTC
Created bash tracking bugs for this issue:

Affects: fedora-all [bug 1396387]

Comment 19 errata-xmlrpc 2017-03-21 11:14:40 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:0725 https://rhn.redhat.com/errata/RHSA-2017-0725.html

Comment 20 errata-xmlrpc 2017-08-01 20:33:20 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1931 https://access.redhat.com/errata/RHSA-2017:1931


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