High severity7.8NVD Advisory· Published Nov 28, 2019· Updated Jun 17, 2026
CVE-2019-18276
CVE-2019-18276
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.
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Affected products
21cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*+ 15 more
- cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*range: <=5.0
- cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:*
- cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:*
- (no CPE)range: <=5.0 patch 11
- cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
- cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:*Range: >=9.5
- cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
- GNU/Bashdescription
Patches
Vulnerability mechanics
References
7- github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ffnvdPatchThird Party Advisory
- www.oracle.com/security-alerts/cpuapr2022.htmlnvdPatchThird Party Advisory
- packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.htmlnvdExploitThird Party AdvisoryVDB Entry
- www.youtube.com/watchnvdExploitThird Party Advisory
- security.gentoo.org/glsa/202105-34nvdThird Party Advisory
- security.netapp.com/advisory/ntap-20200430-0003/nvdThird Party Advisory
- lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3Envd
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