CVE-2019-18276
First published: Thu Nov 28 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| IBM Cloud Pak for Security (CP4S) | <=1.7.2.0 | |
| IBM Cloud Pak for Security (CP4S) | <=1.7.1.0 | |
| IBM Cloud Pak for Security (CP4S) | <=1.7.0.0 | |
| GNU Bash | <=5.0 | |
| GNU Bash | =5.0-beta1 | |
| GNU Bash | =5.0-beta2 | |
| GNU Bash | =5.0-patch1 | |
| GNU Bash | =5.0-patch10 | |
| GNU Bash | =5.0-patch11 | |
| GNU Bash | =5.0-patch2 | |
| GNU Bash | =5.0-patch3 | |
| GNU Bash | =5.0-patch4 | |
| GNU Bash | =5.0-patch5 | |
| GNU Bash | =5.0-patch6 | |
| GNU Bash | =5.0-patch7 | |
| GNU Bash | =5.0-patch8 | |
| GNU Bash | =5.0-patch9 | |
| GNU Bash | =5.0-rc1 | |
| Netapp Hci Management Node | ||
| Netapp Oncommand Unified Manager Vmware Vsphere | >=9.5 | |
| Netapp Solidfire | ||
| Oracle Communications Cloud Native Core Policy | =1.14.0 |
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Reference Links
- https://exchange.xforce.ibmcloud.com/vulnerabilities/172331
- https://www.ibm.com/support/pages/node/6493729 (Advisory)
- http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html
- https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E
- https://security.gentoo.org/glsa/202105-34
- https://security.netapp.com/advisory/ntap-20200430-0003/
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.youtube.com/watch?v=-wGtxJ8opa8
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).
- collector/ibm-support
- agent/weakness
- agent/type
- agent/event
- agent/references
- agent/severity
- agent/author
- agent/description
- agent/last-modified-date
- agent/remedy
- agent/softwarecombine
- agent/first-publish-date
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/ibm
- canonical/ibm cloud pak for security (cp4s)
- version/ibm cloud pak for security (cp4s)/1.7.2.0
- version/ibm cloud pak for security (cp4s)/1.7.1.0
- version/ibm cloud pak for security (cp4s)/1.7.0.0
- vendor/gnu
- canonical/gnu bash
- version/gnu bash/5.0
- version/gnu bash/5.0-beta1
- version/gnu bash/5.0-beta2
- version/gnu bash/5.0-patch1
- version/gnu bash/5.0-patch10
- version/gnu bash/5.0-patch11
- version/gnu bash/5.0-patch2
- version/gnu bash/5.0-patch3
- version/gnu bash/5.0-patch4
- version/gnu bash/5.0-patch5
- version/gnu bash/5.0-patch6
- version/gnu bash/5.0-patch7
- version/gnu bash/5.0-patch8
- version/gnu bash/5.0-patch9
- version/gnu bash/5.0-rc1
- vendor/netapp
- canonical/netapp hci management node
- canonical/netapp oncommand unified manager vmware vsphere
- version/netapp oncommand unified manager vmware vsphere/9.5
- canonical/netapp solidfire
- vendor/oracle
- canonical/oracle communications cloud native core policy
- version/oracle communications cloud native core policy/1.14.0