CVE-2019-18276

CVSS V2 High 7.2 CVSS V3 High 7.8
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.
Overview
  • CVE ID
  • CVE-2019-18276
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-11-28T01:15:10
  • Last Modified Date
  • 2022-06-07T18:41:39
Weakness Enumerations
CWE URL
CWE-273 http://cwe.mitre.org/data/definitions/273.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:* 1 OR 5.0
cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:* 1 OR
cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:* 1 OR 9.5
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* 1 OR
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:* 1 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:L/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • LOW
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 7.2
  • Severity
  • HIGH
  • Exploitability Score
  • 3.9
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7.8
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1.8
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://www.youtube.com/watch?v=-wGtxJ8opa8 Exploit Third Party Advisory
https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff Patch Third Party Advisory
http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html Exploit Third Party Advisory VDB Entry
https://security.netapp.com/advisory/ntap-20200430-0003/ Third Party Advisory
https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772@%3Cdev.mina.apache.org%3E Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202105-34
https://www.oracle.com/security-alerts/cpuapr2022.html
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-18276
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-18276
History
Created Old Value New Value Data Type Notes
2022-04-20 17:00:07 Added to TrackCVE
2022-12-04 07:11:05 2019-11-28T01:15Z 2019-11-28T01:15:10 CVE Published Date updated
2022-12-04 07:11:05 2022-06-07T18:41:39 CVE Modified Date updated
2022-12-04 07:11:05 Analyzed Vulnerability Status updated