Node.js before 16.4.1, 14.17.2, 12.22.2 is vulnerable to an out-of-bounds read when uv__idna_toascii() is used to convert strings to ASCII. The pointer p is read and increased without checking whether it is beyond pe, with the latter holding a pointer to the end of the buffer. This can lead to information disclosures or crashes. This function can be triggered via uv_getaddrinfo().

References

• https://nvd.nist.gov/vuln/detail/CVE-2021-22918
• https://hackerone.com/reports/1209681
• https://nodejs.org/en/blog/vulnerability/july-2021-security-releases/
• https://security.netapp.com/advisory/ntap-20210805-0003/
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
• https://security.gentoo.org/glsa/202401-23