Vulnerability Details : CVE-2019-9039
Potential exploit
In Couchbase Sync Gateway 2.1.2, an attacker with access to the Sync Gateway’s public REST API was able to issue additional N1QL statements and extract sensitive data or call arbitrary N1QL functions through the parameters "startkey" and "endkey" on the "_all_docs" endpoint. By issuing nested queries with CPU-intensive operations they may have been able to cause increased resource usage and denial of service conditions. The _all_docs endpoint is not required for Couchbase Mobile replication and external access to this REST endpoint has been blocked to mitigate this issue. This issue has been fixed in versions 2.5.0 and 2.1.3.
Vulnerability category: Sql InjectionDenial of service
Products affected by CVE-2019-9039
- cpe:2.3:a:couchbase:sync_gateway:2.1.2:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2019-9039
0.30%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 53 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2019-9039
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
CWE ids for CVE-2019-9039
-
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.Assigned by: nvd@nist.gov (Primary)
References for CVE-2019-9039
-
https://www.couchbase.com/resources/security#SecurityAlerts
Enterprise-Level Security | Couchbase
-
https://docs.couchbase.com/sync-gateway/2.5/release-notes.html
Release Notes | Couchbase DocsRelease Notes;Vendor Advisory
-
https://research.hisolutions.com/2019/06/n1ql-injection-in-couchbase-sync-gateway-cve-2019-9039/
N1QL Injection in Couchbase Sync Gateway - CVE-2019-9039 – HiSolutions ResearchExploit;Third Party Advisory
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