GO-2021-0239
Improper sanitization when resolving values from DNS in net
At a glance
- Published
- Updated
- CVE
- CVE-2021-33195
- Aliases
- BIT-golang-2021-33195
Description
The LookupCNAME, LookupSRV, LookupMX, LookupNS, and LookupAddr functions and their respective methods on the Resolver type may return arbitrary values retrieved from DNS which do not follow the established RFC 1035 rules for domain names. If these names are used without further sanitization, for instance unsafely included in HTML, they may allow for injection of unexpected content. Note that LookupTXT may still return arbitrary values that could require sanitization before further use.
Affected packages
| Package | Versions |
|---|---|
| Go · stdlib | introduced 0, fixed 1.15.13, introduced 1.16.0-0, fixed 1.16.5 |
References
- https://go.dev/cl/320949 FIX
- https://go.googlesource.com/go/+/c89f1224a544cde464fcb86e78ebb0cc97eedba2 FIX
- https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI WEB
- https://go.dev/issue/46241 REPORT
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |