module: std
package: math/big
versions:
- fixed: go1.15.13
- fixed: go1.16.5
- fixed: go1.17.0
description: |
  Rat.SetString and Rat.UnmarshalText may cause a panic or an
  unrecoverable fatal error if passed inputs with very large
  exponents.
cves:
- CVE-2021-33198
credit: |
  the OSS-Fuzz project for discovering this issue and to Emmanuel
  Odeke for reporting it
symbols:
- Rat.SetString
links:
  pr: https://go.dev/cl/316149
  commit: https://go.googlesource.com/go/+/6c591f79b0b5327549bd4e94970f7a279efb4ab0
  context:
  - https://groups.google.com/g/golang-announce/c/RgCMkAEQjSI
  - https://go.dev/issue/45910