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ubuntucveUbuntu.comUB:CVE-2014-6278
HistorySep 30, 2014 - 12:00 a.m.

CVE-2014-6278

2014-09-3000:00:00
ubuntu.com
ubuntu.com
81

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%

JSON

GNU Bash through 4.3 bash43-026 does not properly parse function
definitions in the values of environment variables, which allows remote
attackers to execute arbitrary commands via a crafted environment, as
demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd,
the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts
executed by unspecified DHCP clients, and other situations in which setting
the environment occurs across a privilege boundary from Bash execution.
NOTE: this vulnerability exists because of an incomplete fix for
CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.

Notes

Author Note
mdeslaur this issue is mitigated by Florian Weimer’s prefix-suffix patch that is included in https://ubuntu.com/security/notices/USN-2364-1 since bash parser vulnerabilities are now limited to specially named environment variables, and as such are no longer directly exposed to CGI scripts, SSH, etc. Once an upstream patch is made available, we will release bash updates, but we don’t consider this to be a critical issue requiring immediate attention.
OSVersionArchitecturePackageVersionFilename
ubuntu10.04noarchbash< 4.1-2ubuntu3.5UNKNOWN
ubuntu12.04noarchbash< 4.2-2ubuntu2.6UNKNOWN
ubuntu14.04noarchbash< 4.3-7ubuntu1.5UNKNOWN

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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%

JSON
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