CVE - CVE-2019-18276

CVE-ID
CVE-2019-18276	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff URL:https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff CONFIRM:https://security.netapp.com/advisory/ntap-20200430-0003/ URL:https://security.netapp.com/advisory/ntap-20200430-0003/ GENTOO:GLSA-202105-34 URL:https://security.gentoo.org/glsa/202105-34 MISC:http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html URL:http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html MISC:https://www.oracle.com/security-alerts/cpuapr2022.html URL:https://www.oracle.com/security-alerts/cpuapr2022.html MISC:https://www.youtube.com/watch?v=-wGtxJ8opa8 URL:https://www.youtube.com/watch?v=-wGtxJ8opa8 MLIST:[mina-dev] 20210225 [jira] [Created] (FTPSERVER-500) Security vulnerability in common/lib/log4j-1.2.17.jar URL:https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
Assigning CNA
MITRE Corporation
Date Record Created
20191023	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20191023)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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