GNU Bash up to 3.2.48 Patch User Script os command injection

CVSS Meta Temp Score
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CTI Interest Score
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9.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in GNU Bash. The impacted element is an unknown function of the component Patch User Script Handler. Such manipulation leads to os command injection. This vulnerability is uniquely identified as CVE-2014-6278. Moreover, an exploit is present. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in GNU Bash and classified as very critical. Affected by this issue is an unknown functionality of the component Patch User Script Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability.

The weakness was disclosed 09/27/2014 by Michal Zalewski as Bash bug: apply Florian's patch now (CVE-2014-6277 and CVE-2014-6278) as confirmed posting (Blog). The advisory is shared for download at lcamtuf.blogspot.com. This vulnerability is handled as CVE-2014-6278 since 09/09/2014. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details are unknown but a public exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 12/30/2025). The MITRE ATT&CK project declares the attack technique as T1202.

A public exploit has been developed by lastc0de and been published immediately after the advisory. The exploit is available at lcamtuf.blogspot.ch. It is declared as attacked. The vulnerability scanner Nessus provides a plugin with the ID 82581 (GNU Bash Incomplete Fix Remote Code Injection (Shellshock)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CGI abuses and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 195641 (Ubuntu Security Notification for Bash Vulnerabilities (USN-2380-1)). The code used by the exploit is:

foo='() { echo not patched; }' bash -c foo
This issue was added on 10/02/2025 to the CISA Known Exploited Vulnerabilities Catalog with a due date of 10/23/2025:
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Applying a patch is able to eliminate this problem. A possible mitigation has been published 22 hours after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 31975. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 16798.

The vulnerability is also documented in the databases at X-Force (96687), Exploit-DB (39887), Tenable (82581), EUVD (EUVD-2014-6163) and SecurityFocus (BID 70166†). bugzilla.redhat.com is providing further details. The entries VDB-67711 and VDB-68865 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Apple iPhone (Jailbreak only)
  • Apple Mac OS X up to 10.9.4
  • Debian GNU/Linux up to 4.1-3/4.2
  • F5 BIG-IP up to 11.6.0
  • Madravia Linux 1.0
  • Palo Alto PAN-OS up to 6.0
  • Red Hat Linux 4/5/6/7
  • Slackware Linux up to 14.1
  • SuSE openSUSE 11.0
  • Ubuntu Linux up to 14.04 LTS
  • VMware Fusion

Not Affected

  • Android Default Installation
  • FreeBSD Default Installation
  • NetBSD Default Installation
  • OpenBSD Default Installation

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.5

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Attacked
Author: lastc0de
Download: 🔍

EPSS Score: 🔍
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KEV Added: 🔍
KEV Due: 🔍
KEV Remediation: 🔍
KEV Ransomware: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 82581
Nessus Name: GNU Bash Incomplete Fix Remote Code Injection (Shellshock)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 103414
OpenVAS Name: GNU Bash Environment Variable Handling Shell Remote Command Execution Vulnerability (SIP Check)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: bash_shellshock_ucsmgr
Saint Name: Bash environment variable command injection in Cisco UCS Manager

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: apache_mod_cgi_bash_env.rb
MetaSploit Name: Apache ActiveMQ Directory Traversal
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Exploit Delay Time: 🔍
Snort ID: 31975
Snort Message: OS-OTHER Bash CGI environment variable injection attempt
Snort Class: 🔍
TippingPoint: 🔍

McAfee IPS: 🔍
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Fortigate IPS: 🔍

Timelineinfo

09/09/2014 🔍
09/24/2014 +14 days 🔍
09/27/2014 +3 days 🔍
09/27/2014 +0 days 🔍
09/27/2014 +0 days 🔍
09/28/2014 +0 days 🔍
09/28/2014 +0 days 🔍
09/30/2014 +2 days 🔍
10/01/2014 +1 days 🔍
04/06/2015 +186 days 🔍
03/01/2016 +331 days 🔍
06/06/2016 +96 days 🔍
12/30/2025 +3494 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bash bug: apply Florian's patch now (CVE-2014-6277 and CVE-2014-6278)
Researcher: Michal Zalewski
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-6278 (🔍)
GCVE (CVE): GCVE-0-2014-6278
GCVE (VulDB): GCVE-100-67712
EUVD: 🔍

OVAL: 🔍
IAVM: 🔍

X-Force: 96687 - GNU Bash user scripts code execution, High Risk
SecurityFocus: 70166 - GNU Bash CVE-2014-6278 Incomplete Fix Remote Code Execution Vulnerability
Secunia: 61641 - Blue Coat Multiple Products Bash Multiple Vulnerabilities, Highly Critical
Vulnerability Center: 56922 - GNU Bash Through 4.3 bash43-026 Remote Code Execution via a Crafted Environment - CVE-2014-6278, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 10/01/2014 10:48
Updated: 12/30/2025 22:35
Changes: 10/01/2014 10:48 (98), 08/25/2018 09:26 (16), 02/21/2022 08:41 (3), 07/15/2024 02:34 (14), 10/01/2025 18:35 (1), 10/02/2025 19:54 (16), 12/30/2025 22:35 (1)
Complete: 🔍
Cache ID: 216:AF6:103

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