Vulnerability Report: GO-2021-0239
standard library- CVE-2021-33195
- Affects: net
- Published: Feb 17, 2022
- Modified: May 20, 2024
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
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PathGo VersionsSymbols
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before go1.15.13, from go1.16.0-0 before go1.16.5
Aliases
References
- https://go.dev/cl/320949
- https://go.googlesource.com/go/+/c89f1224a544cde464fcb86e78ebb0cc97eedba2
- https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI
- https://go.dev/issue/46241
- https://vuln.go.dev/ID/GO-2021-0239.json
Credits
- Philipp Jeitner, Haya Shulman from Fraunhofer SIT
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