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By the Year

In 2022 there have been 0 vulnerabilities in GNU Bash . Bash did not have any published security vulnerabilities last year.

Year Vulnerabilities Average Score
2022 0 0.00
2021 0 0.00
2020 0 0.00
2019 2 7.80
2018 0 0.00

It may take a day or so for new Bash vulnerabilities to show up in the stats or in the list of recent security vulnerabilties. Additionally vulnerabilities may be tagged under a different product or component name.

Recent GNU Bash Security Vulnerabilities

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11

CVE-2019-18276 7.8 - High - November 28, 2019

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11. By default, if Bash is run with its effective UID not equal to its real UID, it will drop privileges by setting its effective UID to its real UID. However, it does so incorrectly. On Linux and other systems that support "saved UID" functionality, the saved UID is not dropped. An attacker with command execution in the shell can use "enable -f" for runtime loading of a new builtin, which can be a shared object that calls setuid() and therefore regains privileges. However, binaries running with an effective UID of 0 are unaffected.

Improper Check for Dropped Privileges

rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus

CVE-2019-9924 7.8 - High - March 22, 2019

rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user to execute any command with the permissions of the shell.

AuthZ

popd in bash might allow local users to bypass the restricted shell

CVE-2016-9401 5.5 - Medium - January 23, 2017

popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.

Dangling pointer

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

CVE-2014-6278 - September 30, 2014

GNU Bash through 4.3 bash43-026 does not properly parse function definitions in the values of environment variables, which allows remote attackers to execute arbitrary commands via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271, CVE-2014-7169, and CVE-2014-6277.

Shell injection

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

CVE-2014-7169 - September 25, 2014

GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed function definitions in the values of environment variables, which allows remote attackers to write to files or possibly have unknown other impact via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution. NOTE: this vulnerability exists because of an incomplete fix for CVE-2014-6271.

Shell injection

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which

CVE-2014-6271 9.8 - Critical - September 24, 2014

GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute arbitrary code via a crafted environment, as demonstrated by vectors involving the ForceCommand feature in OpenSSH sshd, the mod_cgi and mod_cgid modules in the Apache HTTP Server, scripts executed by unspecified DHCP clients, and other situations in which setting the environment occurs across a privilege boundary from Bash execution, aka "ShellShock." NOTE: the original fix for this issue was incorrect; CVE-2014-7169 has been assigned to cover the vulnerability that is still present after the incorrect fix.

Shell injection

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