GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote att

Affected versions

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

• gnu bash1.14.0
• gnu bash1.14.1
• gnu bash1.14.2
• gnu bash1.14.3
• gnu bash1.14.4
• gnu bash1.14.5
• gnu bash1.14.6
• gnu bash1.14.7
• gnu bash2.0
• gnu bash2.01
• gnu bash2.01.1
• gnu bash2.02
• gnu bash2.02.1
• gnu bash2.03
• gnu bash2.04
• gnu bash2.05
• gnu bash3.0
• gnu bash3.0.16
• gnu bash3.1
• gnu bash3.2

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-2014-7169GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variablKEV
  99Now
• 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-2014-7187Off-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.