RCE in GNU Bash
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.060 (93.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.060 · newest: 0.060 · change: 0.000
Affected products
- GNU Bash — versions 4.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2016/09/27/9 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/09/16/8 (mailing-list, Patch, Mailing List, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0725.html (vendor-advisory)
- www.openwall.com/lists/oss-security/2016/09/29/27 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/09/20/1 (mailing-list, Mailing List, Third Party Advisory)
- www.securityfocus.com/bid/92999 (VDB Entry, Third Party Advisory, vdb-entry)
- access.redhat.com/errata/RHSA-2017:1931 (vendor-advisory)
- www.openwall.com/lists/oss-security/2016/10/07/6 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/09/18/11 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2016/09/19/7 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2016-0634?
- CVE-2016-0634 is a high-severity vulnerability in GNU Bash, classified under OS Command Injection. CVSS score: 7.5/10. Published 2017-08-28.
- How severe is CVE-2016-0634?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2016-0634 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.