CVE-2021-24032

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Zstd is a fast lossless compression algorithm. It's backed by a very fast entropy stage, provided by Huff0 and FSE library. It's a real-time compression scenario for zlib levels and has a better compression ratio.

Security Fix(es):

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.(CVE-2021-24032)

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties (CVE-2021-24032).

This update for zstd fixes the following issues:

• CVE-2021-24031: Added read permissions to files while being compressed or uncompressed (bsc#1183371).
• CVE-2021-24032: Fixed a race condition which could have allowed an attacker to access world-readable destination file (bsc#1183370).

This update was imported from the SUSE:SLE-15:Update update project.

This update for zstd fixes the following issues:

• CVE-2021-24031: Added read permissions to files while being compressed or uncompressed (bsc#1183371).
• CVE-2021-24032: Fixed a race condition which could have allowed an attacker to access world-readable destination file (bsc#1183370).

It was discovered that libzstd incorrectly handled file permissions. A local attacker could possibly use this issue to access certain files, contrary to expectations.

It was discovered that Zstandard was not properly managing file permissions when generating output files. A local attacker could possibly use this issue to cause a race condition and gain unauthorized access to sensitive data.