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slackwareSlackware Linux ProjectSSA-2017-251-01
HistorySep 08, 2017 - 6:06 p.m.

[slackware-security] bash

2017-09-0818:06:14
Slackware Linux Project
www.slackware.com
29

8.4 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.016 Low

EPSS

Percentile

87.1%

New bash packages are available for Slackware 13.1, 13.37, 14.0, 14.1, and 14.2
to fix security issues.

Here are the details from the Slackware 14.2 ChangeLog:

patches/packages/bash-4.3.048-i586-1_slack14.2.txz: Upgraded.
This update fixes two security issues found in bash before 4.4:
The expansion of ‘\h’ in the prompt string allows remote authenticated users
to execute arbitrary code via shell metacharacters placed in ‘hostname’ of a
machine. The theoretical attack vector is a hostile DHCP server providing a
crafted hostname, but this is unlikely to occur in a normal Slackware
configuration as we ignore the hostname provided by DHCP.
Specially crafted SHELLOPTS+PS4 environment variables used against bogus
setuid binaries using system()/popen() allowed local attackers to execute
arbitrary code as root.
For more information, see:
https://vulners.com/cve/CVE-2016-0634
https://vulners.com/cve/CVE-2016-7543
(* Security fix *)

Where to find the new packages:

Thanks to the friendly folks at the OSU Open Source Lab
(http://osuosl.org) for donating FTP and rsync hosting
to the Slackware project! :-)

Also see the “Get Slack” section on http://slackware.com for
additional mirror sites near you.

Updated package for Slackware 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware-13.1/patches/packages/bash-4.1.017-i486-2_slack13.1.txz

Updated package for Slackware x86_64 13.1:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.1/patches/packages/bash-4.1.017-x86_64-2_slack13.1.txz

Updated package for Slackware 13.37:
ftp://ftp.slackware.com/pub/slackware/slackware-13.37/patches/packages/bash-4.1.017-i486-2_slack13.37.txz

Updated package for Slackware x86_64 13.37:
ftp://ftp.slackware.com/pub/slackware/slackware64-13.37/patches/packages/bash-4.1.017-x86_64-2_slack13.37.txz

Updated package for Slackware 14.0:
ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/bash-4.2.053-i486-2_slack14.0.txz

Updated package for Slackware x86_64 14.0:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/bash-4.2.053-x86_64-2_slack14.0.txz

Updated package for Slackware 14.1:
ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/bash-4.2.053-i486-2_slack14.1.txz

Updated package for Slackware x86_64 14.1:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/bash-4.2.053-x86_64-2_slack14.1.txz

Updated package for Slackware 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware-14.2/patches/packages/bash-4.3.048-i586-1_slack14.2.txz

Updated package for Slackware x86_64 14.2:
ftp://ftp.slackware.com/pub/slackware/slackware64-14.2/patches/packages/bash-4.3.048-x86_64-1_slack14.2.txz

MD5 signatures:

Slackware 13.1 package:
9abb18ec9eca5dc861c048b1ea355d1d bash-4.1.017-i486-2_slack13.1.txz

Slackware x86_64 13.1 package:
1224b57cfde4e26d0c4168b932626cb6 bash-4.1.017-x86_64-2_slack13.1.txz

Slackware 13.37 package:
a198fa801fe0fbc7dfc90519c4f0a4dd bash-4.1.017-i486-2_slack13.37.txz

Slackware x86_64 13.37 package:
540f83ad5562accafc9817755237fc88 bash-4.1.017-x86_64-2_slack13.37.txz

Slackware 14.0 package:
78991c651987b6a385f25427db991b72 bash-4.2.053-i486-2_slack14.0.txz

Slackware x86_64 14.0 package:
f32fc974dd445aeff02b26326558a1f8 bash-4.2.053-x86_64-2_slack14.0.txz

Slackware 14.1 package:
1904564bd3ff4d511ac426f0a7357208 bash-4.2.053-i486-2_slack14.1.txz

Slackware x86_64 14.1 package:
c4af5b385df7d367073234b08b8a719c bash-4.2.053-x86_64-2_slack14.1.txz

Slackware 14.2 package:
f731b645002567ad7c6e536753fe7865 bash-4.3.048-i586-1_slack14.2.txz

Slackware x86_64 14.2 package:
702caa59bcbb6eb1e5d3fb1afb9922eb bash-4.3.048-x86_64-1_slack14.2.txz

Installation instructions:

Upgrade the package as root:
> upgradepkg bash-4.3.048-i586-1_slack14.2.txz

8.4 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.2 High

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

0.016 Low

EPSS

Percentile

87.1%