GNU Bash up to 3.2.48 os command injection

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9.0$0-$5k0.00

Summaryinfo

A vulnerability was found in GNU Bash. It has been rated as critical. The affected element is an unknown function. This manipulation causes os command injection. This vulnerability is handled as CVE-2014-6277. Additionally, an exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in GNU Bash and classified as critical. Affected by this vulnerability is an unknown function. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was released 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). It is possible to read the advisory at lcamtuf.blogspot.com. This vulnerability is known as CVE-2014-6277 since 09/09/2014. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at lcamtuf.blogspot.ch. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 78067 (Bash Remote Code Execution (CVE-2014-6277 / CVE-2014-6278) (Shellshock)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gain a shell remotely and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370037 (Citrix XenServer Security Update (CTX200223)). The code used by the exploit is:

foo='() { echo not patched; }' bash -c foo

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 31975.

The vulnerability is also documented in the databases at X-Force (96686), Exploit-DB (35081), Tenable (78067), SecurityFocus (BID 70165†) and Secunia (SA61641†). Additional details are provided at bugzilla.redhat.com. Entries connected to this vulnerability are available at VDB-67685, VDB-67712 and VDB-68865. Be aware that VulDB is the high quality source for vulnerability data.

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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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
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: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 78067
Nessus Name: Bash Remote Code Execution (CVE-2014-6277 / CVE-2014-6278) (Shellshock)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 58814
OpenVAS Name: Oracle Linux Local Check: ELSA-2014-3093
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

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: 🔍

Timelineinfo

09/09/2014 🔍
09/27/2014 +18 days 🔍
09/27/2014 +0 days 🔍
09/27/2014 +0 days 🔍
09/27/2014 +0 days 🔍
09/27/2014 +0 days 🔍
09/28/2014 +1 days 🔍
10/01/2014 +3 days 🔍
10/06/2014 +5 days 🔍
11/16/2024 +3694 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-2014-6277 (🔍)
GCVE (CVE): GCVE-0-2014-6277
GCVE (VulDB): GCVE-100-67711

OVAL: 🔍
IAVM: 🔍

X-Force: 96686 - GNU Bash function definitions code execution, High Risk
SecurityFocus: 70165 - GNU Bash CVE-2014-6277 Incomplete Fix Remote Code Execution Vulnerability
Secunia: 61641 - Blue Coat Multiple Products Bash Multiple Vulnerabilities, Highly Critical

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

Entryinfo

Created: 10/01/2014 10:44
Updated: 11/16/2024 22:30
Changes: 10/01/2014 10:44 (90), 05/02/2019 17:00 (3), 02/21/2022 08:37 (3), 11/16/2024 22:30 (14)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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