CVE-2017-3140
An error processing RPZ rules can cause named to loop endlessly after handling a query
- Published
- Updated
- Reserved
- Assigned by
- isc
Description
If named is configured to use Response Policy Zones (RPZ) an error processing some rule types can lead to a condition where BIND will endlessly loop while handling a query. Affects BIND 9.9.10, 9.10.5, 9.11.0->9.11.1, 9.9.10-S1, 9.10.5-S1.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| iscCNA (assigner) | 3.0 | Low3.7 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.0 | Medium5.9 | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 12.2% · top 3.8% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Weakness
- A server is potentially vulnerable to degradation of service if the server is configured to use RPZ, the server uses NSDNAME or NSIP policy rules, and an attacker can cause the server to process a specific query Successful exploitation of this condition will cause named to enter a state where it continues to loop while processing the query without ever reaching an end state. While in this state, named repeatedly queries the same sets of authoritative nameservers and this behavior will usually persist indefinitely beyond the normal client query processing timeout. By triggering this condition multiple times, an attacker could cause a deliberate and substantial degradation in service. Operators of servers that meet the above conditions 1. and 2. may also accidentally encounter this defect during normal operation. It is for this reason that the decision was made to issue this advisory despite its low CVSS score.
- CWE-400 (opens in a new tab)Other CVEs with CWE-400
Affected products
ISC · BIND 9
- affected 9.9.10, 9.10.5, 9.11.0->9.11.1, 9.9.10-S1, 9.10.5-S1
What to do
Solution: Upgrade to the patched release most closely related to your current version of BIND. These can all be downloaded from http://www.isc.org/downloads. BIND 9 version 9.9.10-P1 BIND 9 version 9.10.5-P1 BIND 9 version 9.11.1-P1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9 version 9.9.10-S2 BIND 9 version 9.10.5-S2
Workaround: Only the NSDNAME and NSIP RPZ rule types can cause this condition to occur. You can work around this vulnerability if you are able to express your desired policy while avoiding NSDNAME or NSIP rules, otherwise it is advised that you upgrade to a version which corrects the defect.
References (6)
- 1038692 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- GLSA-201708-01 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- 99088 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03772en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://security.netapp.com/advisory/ntap-20180926-0001/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://kb.isc.org/docs/aa-01495 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-3140)Record last updated .