CVE-2019-18276

Name: CVE-2019-18276
Creator: NVD / NIST
Published: 2019-11-28T01:15:10.603+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 2.61%

Last modified Jun 17, 2026

CVE-2019-18276 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 2.61% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

2.61%

83.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Gnu	Bash	<= 5.0	—
Gnu	Bash	5.0	Beta1
Netapp	Hci Management Node	All versions	—
Netapp	Oncommand Unified Manager	>= 9.5	—
Netapp	Solidfire	All versions	—
Oracle	Communications Cloud Native Core Policy	1.14.0	—

References

http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ffPatch, Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://security.gentoo.org/glsa/202105-34Third Party Advisory
https://security.netapp.com/advisory/ntap-20200430-0003/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.youtube.com/watch?v=-wGtxJ8opa8Exploit, Third Party Advisory
http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ffPatch, Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
https://security.gentoo.org/glsa/202105-34Third Party Advisory
https://security.netapp.com/advisory/ntap-20200430-0003/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://www.youtube.com/watch?v=-wGtxJ8opa8Exploit, Third Party Advisory

Timeline

Published: Nov 28, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18276?

How severe is CVE-2019-18276?

CVE-2019-18276 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 2.61% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18276?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18276?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST