Go version v0.3.3 of the x/text package fixes a vulnerability in encoding/unicode that could lead to the UTF-16 decoder entering an infinite loop, causing the program to crash or run out of memory. An attacker could provide a single byte to a UTF16 decoder instantiated with UseBOM or ExpectBOM to trigger an infinite loop if the String function on the Decoder is called, or the Decoder is passed to golang.org/x/text/transform.String.

Specific Go Packages Affected

golang.org/x/text/encoding/unicode
golang.org/x/text/transform

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-14040
• golang/go#39491
• golang/text@23ae387
• https://go-review.googlesource.com/c/text/+/238238
• https://groups.google.com/forum/#!topic/golang-announce/bXVeAmGOqz0
• https://groups.google.com/g/golang-announce/c/bXVeAmGOqz0
• https://go.dev/cl/238238
• https://go.dev/issue/39491
• https://go.googlesource.com/text/+/23ae387dee1f90d29a23c0e87ee0b46038fbed0e
• https://lists.fedoraproject.org/archives/list/[email protected]/message/TACQFZDPA7AUR6TRZBCX2RGRFSDYLI7O