bash: Specially crafted SHELLOPTS+PS4 variables allows command substitution
Published Jan 19, 2017
8.4
HIGHCVSS 3.0
EPSS 0.58%
Description
Bash before 4.4 allows local users to execute arbitrary commands with root privileges via crafted SHELLOPTS and PS4 environment variables.
Affected products
No data.
Configuration 2
- 23
- 24
- 25
No data.
Red Hat Enterprise Linux 6
bash-0:4.1.2-48.el6
Fixed · RHSA-2017:0725
Red Hat Enterprise Linux 7
bash-0:4.2.46-28.el7
Fixed · RHSA-2017:1931
Red Hat Enterprise Linux 5
bash
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | bash-0:4.1.2-48.el6 | Fixed | RHSA-2017:0725 |
| Red Hat Enterprise Linux 7 | bash-0:4.2.46-28.el7 | Fixed | RHSA-2017:1931 |
| Red Hat Enterprise Linux 5 | bash | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.58% (0.00576) | 45.50th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.58% (0.00581) | 42.99th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00086) | 22.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.15% (0.00149) | 52.44th | v3 (v2023.03.01) |
| Jun 14, 2024 | 0.15% (0.00149) | 51.22th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.15% (0.00149) | 49.20th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.54% (0.01537) | 74.52th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.54% (0.01537) | 74.48th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.54% (0.01537) | 72.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.54% (0.01537) | 51.33th | v2 (v2022.01.01) |
References (15)
- http://rhn.redhat.com/errata/RHSA-2017-0725.html vendor-advisoryx_refsource_REDHAT
- http://www.openwall.com/lists/oss-security/2016/09/26/9 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/93183 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1037812 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/errata/RHSA-2017:1931 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2016-7543 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1379630 Issue Tracking
- https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05388115 x_refsource_CONFIRM
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F7XOQSHU63Y357NHU5FPTFBM6I3YOCQB/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OU3C756YPHDAAPFX76UGZBAQQQ5UMHS5/ vendor-advisoryx_refsource_FEDORA
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z2VRBSIPZDZ75ZQ2DLITHUIDW4W26KVR/ vendor-advisoryx_refsource_FEDORA
- https://lists.gnu.org/archive/html/bug-bash/2016-09/msg00018.html mailing-listx_refsource_MLISTPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-7543
- https://security.gentoo.org/glsa/201701-02 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-7543
Change history (0)
No recorded changes yet.