Auth bypass in Gnu Bash
CVE-2019-9924
rbash in Bash before 4.4-beta2 did not prevent the shell user from modifying BASH_CMDS, thus allowing the user to execute any command with the permissions of the shell.
Vulnerability class: Broken Access Control
EPSS: 0.004 (33.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Gnu Bash — versions 4.4
- Netapp Hci_management_node
- Netapp Solidfire
- Canonical Ubuntu_linux — versions 12.04, 14.04, 16.04
- Debian Debian_linux — versions 8.0
- Opensuse Leap — versions 42.3
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC, Issue Tracking)
- cve@mitre.org (x_refsource_MISC, Vendor Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- cve@mitre.org (x_refsource_CONFIRM, Third Party Advisory)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- cve@mitre.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9924?
- CVE-2019-9924 is a high-severity vulnerability in Gnu Bash, classified under Missing Authorization. CVSS score: 7.8/10. Published 2019-03-22.
- How severe is CVE-2019-9924?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2019-9924 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.