ID CVE-2014-7187
Summary Off-by-one error in the read_token_word function in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service (out-of-bounds array access and application crash) or possibly have unspecified other impact via deeply nested for loops, aka the "word_lineno" issue.
Vulnerable Configurations
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.0
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.1
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.2
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.3
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.4
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.5
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.6
  • GNU Bourne-Again SHellbash (GNU Bash) 1.14.7
  • GNU Bourne-Again SHellbash (GNU Bash) 2.0
  • GNU Bourne-Again SHellbash (GNU Bash) 2.01
  • GNU Bourne-Again SHellbash (GNU Bash) 2.01.1
  • GNU Bourne-Again SHellbash (GNU Bash) 2.02
  • GNU Bourne-Again SHellbash (GNU Bash) 2.02.1
  • GNU Bourne-Again SHellbash (GNU Bash) 2.03
  • GNU Bourne-Again SHellbash (GNU Bash) 2.04
  • GNU Bourne-Again SHellbash (GNU Bash) 2.05
  • GNU Bourne-Again SHellbash (GNU Bash) 2.05a
  • GNU Bourne-Again SHellbash (GNU Bash) 2.05b
  • GNU Bourne-Again SHellbash (GNU Bash) 3.0
  • GNU Bourne-Again SHellbash (GNU Bash) 3.0.16
  • GNU Bourne-Again SHellbash (GNU Bash) 3.1
  • GNU Bourne-Again SHellbash (GNU Bash) 3.2
  • GNU Bourne-Again SHellbash (GNU Bash) 3.2.48
  • GNU Bourne-Again SHellbash (GNU Bash) 4.0
  • GNU Bourne-Again SHellbash (GNU Bash) 4.0 release candidate 1
  • GNU Bourne-Again SHellbash (GNU Bash) 4.1
  • GNU Bourne-Again SHellbash (GNU Bash) 4.2
  • Gnu Bash 4.3
Base: 10.0 (as of 05-02-2015 - 17:42)
Impact: 10.0
  • Filter Failure through Buffer Overflow
    ['In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).']
  • MIME Conversion
    ['An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.']
  • Overflow Binary Resource File
    ['An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.']
  • Buffer Overflow via Symbolic Links
    ['This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.']
  • Overflow Variables and Tags
    ['This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.']
  • Buffer Overflow via Parameter Expansion
    ['In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.']
  • Buffer Overflow in an API Call
    ["This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process."]
  • Buffer Overflow in Local Command-Line Utilities
    ['This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.']
  • Buffer Overflow via Environment Variables
    ['This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.']
  • Overflow Buffers
    ["Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice."]
  • Client-side Injection-induced Buffer Overflow
    ['This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.']
Cisco vFeed
ciscoid cisco-sa-20140926
Exploitdb vFeed
exploitdbid 36933
exploitdbscript platforms/linux/remote/
Hp vFeed
hpid HPSBGN03138
Iavm vFeed
disakey V0054753
iavmid 2014-A-0142
iavmtitle GNU Bash Shell Code Execution Vulnerability
Mandriva vFeed
mandrivaid MDVSA-2015:164
Nessus vFeed
nessus_script_family CISCO
nessus_script_file cisco_telepresence_vcs_CSCur01461.nasl
nessus_script_id 78596
nessus_script_name Cisco TelePresence Video Communication Server Bash Remote Code Execution (Shellshock)
Openvas vFeed
openvas_script_family Gentoo Local Security Checks
openvas_script_file glsa-201410-01.nasl
openvas_script_id 53707
openvas_script_name Gentoo Linux Local Check:
Oval vFeed
ovalclass patch
ovalid oval:org.mitre.oval:def:27163
ovaltitle USN-2364-1 -- bash vulnerabilities
Redhat vFeed
redhatid RHSA-2014:1306
redhatovalid oval:com.redhat.rhsa:def:20141306
redhatupdatedesc RHSA-2014:1306: bash security update (Important)
Scip vFeed
scipid 67708
Suse vFeed
suseid openSUSE-SU-2014:1310
Ubuntu vFeed
ubuntuid USN-2364-1
Vmware vFeed
vmwareid VMSA-2014-0010
Redhat_Bugzilla vFeed
advisory_dateissue 2014-09-26
bugzillaid 1146319
bugzillatitle CVE-2014-7169 bash: code execution via specially-crafted environment (Incomplete fix for CVE-2014-6271)
redhatid RHSA-2014:1306
Last major update 12-03-2015 - 02:00
Published 28-09-2014 - 19:55
Last modified 03-01-2017 - 02:59
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