Compress/s2: Integer Overflow or Wraparound and Out-of-bounds Write in compress

[ Description ]Official description

compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7.

[ Fixes ]Fixes and patches

• github.com/klauspost/compress 1.18.7Fixed version · GitHub Advisories · go package github.com/klauspost/compress: upgrade to 1.18.7 or later (affected <= 1.18.6)

[ Packages ]Affected open-source packages

• github.com/klauspost/compress goAffected <= 1.18.6 · fixed in 1.18.7 · GHSA-259r-337f-4rfw

[ References ]References

• github.com/klauspost/compress/commit/539243b8823ee8f03e49969823d57c348c917536
• github.com/klauspost/compress/releases/tag/v1.18.7
• github.com/klauspost/compress/security/advisories/GHSA-259r-337f-4rfw