Improper input validation in GNU Bash
CVE-2016-7543
Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (45.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- GNU Bash
- Fedoraproject Fedora — versions 23, 24, 25
Weakness classification (CWE)
Public proof-of-concept exploits
References
- rhn.redhat.com/errata/RHSA-2017-0725.html (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- access.redhat.com/errata/RHSA-2017:1931 (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.openwall.com/lists/oss-security/2016/09/26/9 (mailing-list, Mailing List, Third Party Advisory)
- lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html (Vendor Advisory, mailing-list, Patch)
- www.securityfocus.com/bid/93183 (VDB Entry, Third Party Advisory, vdb-entry)
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.securitytracker.com/id/1037812 (vdb-entry)
Frequently asked questions
- What is CVE-2016-7543?
- CVE-2016-7543 is a high-severity vulnerability in GNU Bash, classified under Improper Input Validation. CVSS score: 8.4/10. Published 2017-01-19.
- How severe is CVE-2016-7543?
- High severity. CVSS v3 base score is 8.4 out of 10.
- Is CVE-2016-7543 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.