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@madler madler released this 14 Oct 10:14
· 98 commits to master since this release
v1.2.13
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madler Mark Adler
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zlib 1.2.13 release notes

October 13, 2022

Version 1.2.13 has these key updates:

  • Fix a bug when getting a gzip header extra field with inflateGetHeader(). This remedies CVE-2022-37434.
  • Fix a bug in block type selection when Z_FIXED used. Now the smallest block type is selected, for better compression.
  • Fix a configure issue that discarded the provided CC definition.
  • Correct incorrect inputs provided to the CRC functions. This mitigates a bug in Java.
  • Repair prototypes and exporting of the new CRC functions.
  • Fix inflateBack to detect invalid input with distances too far.
Due to the first bug fix, any installations of 1.2.12 or earlier should be replaced with 1.2.13.
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