[release-branch.go1.13-security] src/go.mod: import x/crypto/cryptobyte security fix for 32-bit archs

    cryptobyte: fix panic due to malformed ASN.1 inputs on 32-bit archs

    When int is 32 bits wide (on 32-bit architectures like 386 and arm), an
    overflow could occur, causing a panic, due to malformed ASN.1 being
    passed to any of the ASN1 methods of String.

    Tested on linux/386 and darwin/amd64.

    This fixes CVE-2020-7919 and was found thanks to the Project Wycheproof
    test vectors.

    Change-Id: I8c9696a8bfad1b40ec877cd740dba3467d66ab54
    Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/645211
    Reviewed-by: Katie Hockman <katiehockman@google.com>
    Reviewed-by: Adam Langley <agl@google.com>

x/crypto/cryptobyte is used in crypto/x509 for parsing certificates.
Malformed certificates might cause a panic during parsing on 32-bit
architectures (like arm and 386).

Change-Id: I840feb54eba880dbb96780ef7adcade073c4c4e3
Reviewed-on: https://team-review.git.corp.google.com/c/golang/go-private/+/647741
Reviewed-by: Katie Hockman <katiehockman@google.com>
5 files changed
tree: 19ddaa047c8bd77bb42b55d8357ce345ad3fc4a0
  1. .gitattributes
  2. .github/
  3. .gitignore
  9. README.md
  10. SECURITY.md
  12. api/
  13. doc/
  14. favicon.ico
  15. lib/
  16. misc/
  17. robots.txt
  18. src/
  19. test/

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