Use After Free in Gnu Bash
CVE-2016-9401
popd in bash might allow local users to bypass the restricted shell and cause a use-after-free via a crafted address.
Vulnerability class: Use-After-Free
EPSS: 0.000 (12.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Gnu Bash — versions 4.4
- Debian Debian_linux — versions 8.0
- Redhat Enterprise_linux_desktop — versions 6.0, 7.0
- Redhat Enterprise_linux_server — versions 6.0, 7.0
- Redhat Enterprise_linux_server_aus — versions 7.4, 7.6, 7.7
- Redhat Enterprise_linux_server_eus — versions 7.4, 7.5, 7.6
- Redhat Enterprise_linux_server_tus — versions 7.6, 7.7
- Redhat Enterprise_linux_workstation — versions 6.0, 7.0
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- cve@mitre.org (x_refsource_REDHAT, vendor-advisory, Third Party Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (vendor-advisory, Third Party Advisory, x_refsource_GENTOO)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-9401?
- CVE-2016-9401 is a medium-severity vulnerability in Gnu Bash, classified under Use After Free. CVSS score: 5.5/10. Published 2017-01-23.
- How severe is CVE-2016-9401?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2016-9401 known to be exploited?
- 13 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.