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TI-2019-13284 Aliases CVE-2019-18276GHSA-jcxc-5f87-vq5m

An issue was discovered in disable_priv_mode in shell.c in GNU Bash through 5.0 patch 11.

Priority HIGH 69CWE-273Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 1 fixed, 3 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.02608 85th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 19

CPEVersionsRoleVendor
cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:*up to 5.0VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:*5.0 beta1VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:*5.0 beta2VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:*5.0 patch1VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:*5.0 patch10VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:*5.0 patch11VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:*5.0 patch2VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:*5.0 patch3VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:*5.0 patch4VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:*5.0 patch5VulnerableGNU
  • cpe:2.3:a:gnu:bash:*:*:*:*:*:*:*:* Versions up to 5.0 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:beta1:*:*:*:*:*:* Versions 5.0 beta1 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:beta2:*:*:*:*:*:* Versions 5.0 beta2 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch1:*:*:*:*:*:* Versions 5.0 patch1 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch10:*:*:*:*:*:* Versions 5.0 patch10 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch11:*:*:*:*:*:* Versions 5.0 patch11 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch2:*:*:*:*:*:* Versions 5.0 patch2 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch3:*:*:*:*:*:* Versions 5.0 patch3 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch4:*:*:*:*:*:* Versions 5.0 patch4 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch5:*:*:*:*:*:* Versions 5.0 patch5 Vulnerable ·GNU
Show 9 more CPE
CPEVersionsRoleVendor
cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:*5.0 patch6VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:*5.0 patch7VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:*5.0 patch8VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:*5.0 patch9VulnerableGNU
cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:*5.0 rc1VulnerableGNU
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:*9.5VulnerableNetApp
cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*not specified by NVDVulnerableNetApp
cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:*1.14.0VulnerableOracle
  • cpe:2.3:a:gnu:bash:5.0:patch6:*:*:*:*:*:* Versions 5.0 patch6 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch7:*:*:*:*:*:* Versions 5.0 patch7 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch8:*:*:*:*:*:* Versions 5.0 patch8 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:patch9:*:*:*:*:*:* Versions 5.0 patch9 Vulnerable ·GNU
  • cpe:2.3:a:gnu:bash:5.0:rc1:*:*:*:*:*:* Versions 5.0 rc1 Vulnerable ·GNU
  • cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:netapp:oncommand_unified_manager:*:*:*:*:*:vmware_vsphere:*:* Versions 9.5 Vulnerable ·NetApp
  • cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
  • cpe:2.3:a:oracle:communications_cloud_native_core_policy:1.14.0:*:*:*:*:*:*:* Versions 1.14.0 Vulnerable ·Oracle

Remediation

Red Hat 1 advisory

  • RHSA-2021:1679 Released 2021-05-18 · Red Hat rating Low
    bash security and bug fix update
    • Red Hat Enterprise Linux BaseOS (v. 8) bash-4.4.19-14.el8, bash-doc-4.4.19-14.el8

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:1679

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-18276
  2. 2026-10-03 Alias added: GHSA-jcxc-5f87-vq5m

References

Exploit 2

Patch 2

Advisory 2

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences