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CVE-2019-18276 (High) detected in bashbash-4.3 #143

Open mend-bolt-for-github[bot] opened 3 years ago

mend-bolt-for-github[bot] commented 3 years ago

CVE-2019-18276 - High Severity Vulnerability

Vulnerable Library - bashbash-4.3

Unofficial mirror of bash repository. Updated daily.

Library home page: https://github.com/bminor/bash.git

Found in base branch: master

Vulnerable Source Files (1)

/bash/bashline.c

Vulnerability Details

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.

Publish Date: 2019-11-28

URL: CVE-2019-18276

CVSS 3 Score Details (7.8)

Base Score Metrics: - Exploitability Metrics: - Attack Vector: Local - Attack Complexity: Low - Privileges Required: Low - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: https://nvd.nist.gov/vuln/detail/CVE-2019-18276

Release Date: 2019-11-28

Fix Resolution: bash-debuginfo - 4.4.19-14;bash - 4.4.19-14,4.4.19-14,4.4.19-14,4.4.19-14,4.4.19-14;bash-doc - 4.4.19-14,4.4.19-14,4.4.19-14,4.4.19-14;bash-debugsource - 4.4.19-14


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