CVE-2019-18276
HIGH 7.8
At a glance
- Source
- NVD
- EPSS
- EPSS 2.61 % · percentile 85 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- mitre
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-273 — Improper Check for Dropped Privileges
References
- https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
- https://security.gentoo.org/glsa/202105-34
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.youtube.com/watch?v=-wGtxJ8opa8
- https://github.com/bminor/bash/commit/951bdaad7a18cc0dc1036bba86b18b90874d39ff
- http://packetstormsecurity.com/files/155498/Bash-5.0-Patch-11-Privilege-Escalation.html
- https://security.netapp.com/advisory/ntap-20200430-0003/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | HIGH 7.2 | AV:L/AC:L/Au:N/C:C/I:C/A:C | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-8065
- GCVE · GCVE-0-2019-18276
CERT-FR advisories
- CERTFR-2025-AVI-1057 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0969 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0756 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0297 — Multiples vulnérabilités dans Juniper · cert.ssi.gouv.fr
- CERTFR-2023-AVI-1015 — Multiples vulnérabilités dans les produits Siemens · cert.ssi.gouv.fr
- CERTFR-2022-AVI-650 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2021-AVI-791 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*≤ 5.0cpe: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:patch1:*:*:*:*:*:*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: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:*:*:*:*:*:*cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:*≥ 9.5cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |