10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.976 High
EPSS
Percentile
100.0%
CentOS Errata and Security Advisory CESA-2014:1306
The GNU Bourne Again shell (Bash) is a shell and command language
interpreter compatible with the Bourne shell (sh). Bash is the default
shell for Red Hat Enterprise Linux.
It was found that the fix for CVE-2014-6271 was incomplete, and Bash still
allowed certain characters to be injected into other environments via
specially crafted environment variables. An attacker could potentially use
this flaw to override or bypass environment restrictions to execute shell
commands. Certain services and applications allow remote unauthenticated
attackers to provide environment variables, allowing them to exploit this
issue. (CVE-2014-7169)
Applications which directly create bash functions as environment variables
need to be made aware of changes to the way names are handled by this
update. Note that certain services, screen sessions, and tmux sessions may
need to be restarted, and affected interactive users may need to re-login.
Installing these updated packages without restarting services will address
the vulnerability, but functionality may be impacted until affected
services are restarted. For more information see the Knowledgebase article
at https://access.redhat.com/articles/1200223
Note: Docker users are advised to use “yum update” within their containers,
and to commit the resulting changes.
For additional information on CVE-2014-6271 and CVE-2014-7169, refer to the
aforementioned Knowledgebase article.
All bash users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue.
Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2014-September/082753.html
https://lists.centos.org/pipermail/centos-announce/2014-September/082754.html
https://lists.centos.org/pipermail/centos-announce/2014-September/082755.html
https://lists.centos.org/pipermail/centos-announce/2014-September/095509.html
https://lists.centos.org/pipermail/centos-announce/2014-September/095566.html
Affected packages:
bash
bash-doc
Upstream details at:
https://access.redhat.com/errata/RHSA-2014:1306
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
CentOS | 5 | i386 | bash | < 3.2-33.el5_10.4 | bash-3.2-33.el5_10.4.i386.rpm |
CentOS | 5 | x86_64 | bash | < 3.2-33.el5_10.4 | bash-3.2-33.el5_10.4.x86_64.rpm |
CentOS | 7 | x86_64 | bash | < 4.2.45-5.el7_0.4 | bash-4.2.45-5.el7_0.4.x86_64.rpm |
CentOS | 7 | x86_64 | bash-doc | < 4.2.45-5.el7_0.4 | bash-doc-4.2.45-5.el7_0.4.x86_64.rpm |
CentOS | 6 | i686 | bash | < 4.1.2-15.el6_5.2 | bash-4.1.2-15.el6_5.2.i686.rpm |
CentOS | 6 | i686 | bash-doc | < 4.1.2-15.el6_5.2 | bash-doc-4.1.2-15.el6_5.2.i686.rpm |
CentOS | 6 | x86_64 | bash | < 4.1.2-15.el6_5.2 | bash-4.1.2-15.el6_5.2.x86_64.rpm |
CentOS | 6 | x86_64 | bash-doc | < 4.1.2-15.el6_5.2 | bash-doc-4.1.2-15.el6_5.2.x86_64.rpm |
CentOS | 5 | i386 | bash | < 3.2-33.el5_10.4 | bash-3.2-33.el5_10.4.i386.rpm |
CentOS | 5 | x86_64 | bash | < 3.2-33.el5_10.4 | bash-3.2-33.el5_10.4.x86_64.rpm |
10 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.976 High
EPSS
Percentile
100.0%