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+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "sharks"
+date = "2024-11-16"
+url = "https://git.distrust.co/public/blahaj/commit/4faab1cd33d455f0ca2ccc7208093fd6c18e0767"
+categories = ["crypto-failure"]
+keywords = ["shamir", "cryptography", "sss"]
+
+[versions]
+patched = []
+
+[affected]
+```
+
+# Bias of Polynomial Coefficients in Secret Sharing
+
+Affected versions of this crate allowed for a bias when generating random
+polynomials for Shamir Secret Sharing, where instead of being within the range
+`[0, 255]` they were instead in the range `[1, 255]`. A description from
+Cure53, who originally found the issue, is available:
+
+> The correct method to select a random polynomial would be to select
+all coefficients (including the most significant coefficient) uniformly
+in the range 0..255 (inclusive). Otherwise, knowledge that a coefficient
+in a polynomial cannot be 0 permits the exclusion of single byte values
+for the shared secret given one share less than required. [...]
+Exploiting this weakness necessitates sharing the same secret multiple
+times. In this scenario, an attacker could exclude an exponential number
+of values for each of the shared bytes until sufficiently few values
+remain for brute forcing.  Cure53 estimates that under ideal
+circumstances (e.g., a 2-out-of-N scheme) a shared secret can be
+reconstructed if the same secret has been distributed 500-1500 times.
+
+Secrets that have been shared a low amount of times (ideally, once) would not
+be impacted. However, secrets that are repeatedly shared may be vulnerable,
+especially if the shares are still available, and should be rotated.
+
+The vulnerability does not impact reconstitution of secrets: secrets that have
+already been split can be recombined without issue.
+
+The flaw can be corrected by changing the lower bound of the polynomial
+coefficient range in the `sharks::math::random_polynomial` function to `0`. The
+`blahaj` crate has been made available with a fixed version of the code, after
+attempts to reach the maintainer of the `sharks` crate were unsuccessful.