CVE-2019-25005: Counter overflow in chacha20

August 25, 2021

An issue was discovered in the chacha20 crate before 0.2.3 for Rust. A ChaCha20 counter overflow makes it easier for attackers to determine plaintext.

References

github.com/RustCrypto/stream-ciphers/pull/64
github.com/RustCrypto/stream-ciphers/tree/master/chacha20
github.com/advisories/GHSA-j2r6-2m5c-vgh5
nvd.nist.gov/vuln/detail/CVE-2019-25005
rustsec.org/advisories/RUSTSEC-2019-0029.html

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