CVE-2016-0634
The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via shell metacharacters placed in 'hostname' of a machine.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 6.02% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- gnu/bash
- Source
- secalert_us@oracle.com
EPSS 6.0% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- http://www.openwall.com/lists/oss-security/2016/09/16/12Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/8Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/18/11Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/19/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/20/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/27/9Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/29/27Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/07/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/10/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/10/4Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/92999Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1931
- https://bugzilla.redhat.com/show_bug.cgi?id=1377613Issue Tracking, Patch, Third Party Advisory, VDB Entry
- https://security.gentoo.org/glsa/201612-39Third Party Advisory
- http://rhn.redhat.com/errata/RHSA-2017-0725.html
- http://www.openwall.com/lists/oss-security/2016/09/16/12Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/16/8Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/18/11Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/19/7Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/20/1Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/27/9Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/09/29/27Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/07/6Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/10/3Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2016/10/10/4Mailing List, Third Party Advisory
- http://www.securityfocus.com/bid/92999Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:1931
- https://bugzilla.redhat.com/show_bug.cgi?id=1377613Issue Tracking, Patch, Third Party Advisory, VDB Entry
- https://security.gentoo.org/glsa/201612-39Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.