GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variabl

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• apple mac os x10.0.0 and later · before 10.10.0
• arista eos4.9.0 and later · before 4.9.12
• arista eos4.13.0 and later · before 4.13.9
• arista eos4.12.0 and later · before 4.12.9
• arista eos4.11.0 and later · before 4.11.11
• arista eos4.10.0 and later · before 4.10.9
• arista eos4.14.0 and later · before 4.14.4f
• canonical ubuntu linux10.04
• canonical ubuntu linux12.04
• canonical ubuntu linux14.04
• checkpoint security gatewaybefore r77.30
• citrix netscaler sdx firmwarebefore 9.3.67.5r1
• citrix netscaler sdx firmware10 and later · before 10.1.129.11r1
• citrix netscaler sdx firmware10.5 and later · before 10.5.52.11r1
• debian debian linux7.0
• f5 arx firmware6.0.0 and later · up to 6.4.0 inclusive
• f5 big-ip access policy manager11.0.0 and later · up to 11.5.1 inclusive
• f5 big-ip access policy manager10.1.0 and later · up to 10.2.4 inclusive
• f5 big-ip access policy manager11.6.0
• f5 big-ip advanced firewall manager11.3.0 and later · up to 11.5.1 inclusive

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2014-6271GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attacKEV
  99Now
• CVE-2014-6278GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attKEV
  95Now
• CVE-2014-7186The redirection implementation in parse.y in GNU Bash through 4.3 bash43-026 allows remote attackers to cause a denial of service (out-of-bo
  61This week
• CVE-2014-6277GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote att
  61This week
• CVE-2014-7187Off-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
  59Plan
• CVE-2016-7543Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.
  33Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1const host = req.body.host;2exec("ping -c 1 " + host, onResult);

1const host = req.body.host;2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.