Home/CVE/The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via s
CVE

CVE-2016-0634

The expansion of '\h' in the prompt string in bash 4.3 allows remote authenticated users to execute arbitrary code via s

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.

HIGH · CVSS 7.5 EPSS 0.03691
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules4 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

1
gnu bashall versions
◈

Sigma Hunt Rules

4
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumInteractive Bash Suspicious Children
productmediumIndirect Command Execution From Script File Via Bash.EXE
productmediumIndirect Inline Command Execution Via Bash.EXE
productlowBash Interactive Shell
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · secalert_us@oracle.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD28 Aug 2017 · 03:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

9
suse-csafSUSE-SU-2018:1398-2
suse-csafSUSE-SU-2018:1398-1
suse-csafSUSE-SU-2017:2699-1
suse-csafSUSE-SU-2017:2700-1
usnUSN-3294-1
🔗

References & Sources

14
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://rhn.redhat.com/errata/RHSA-2017-0725.html
http://www.openwall.com/lists/oss-security/2016/09/16/12Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/16/8Mailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/18/11Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/19/7Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2016/09/20/1Mailing ListThird Party Advisory
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