CVE-2019-18276: High severity ibm cloud pak for security vulnerability
An issue was discovered in disableprivmode 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.
Other sources
GNU Bash could allow a remote authenticated attacker to gain elevated privileges on the system, caused by a flaw in the disableprivmode in shell.c. By sending a specially-crafted command, an attacker could exploit this vulnerability to escalate privileges.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2019-18276.
What is the severity level of CVE-2019-18276?
CVE-2019-18276 has a severity level of 8.8 (high).
What is the affected software for CVE-2019-18276?
The affected software for CVE-2019-18276 includes GNU Bash through 5.0 patch 11, IBM Cloud Pak for Security (CP4S) versions up to 1.7.2.0, and Netapp Hci Management Node, among others.
How can a remote authenticated attacker exploit CVE-2019-18276?
A remote authenticated attacker can gain elevated privileges on the system by exploiting CVE-2019-18276.
Are there any references available for CVE-2019-18276?
Yes, you can find references for CVE-2019-18276 at the following links: [Link 1](http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html), [Link 2](https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff), [Link 3](https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E).