CVE-2021-29482

Description

xz is a compression and decompression library focusing on the xz format completely written in Go. The function readUvarint used to read the xz container format may not terminate a loop provide malicous input. The problem has been fixed in release v0.5.8. As a workaround users can limit the size of the compressed file input to a reasonable size for their use case. The standard library had recently the same issue and got the CVE-2020-16845 allocated.

CVSS Metrics

• v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
• v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.43%• Percentile: 63%

Techniques & Countermeasures

• CWE-835•Loop with Unreachable Exit Condition ('Infinite Loop')

  The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Affected Systems

• github.com/ulikunitz•xz

  < 0.5.8

• ulikunitz•xz

  < 0.5.8

• xz_project•xz

  < 0.5.8

References (5)

• https://github.com/ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27
• https://github.com/ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b
• https://nvd.nist.gov/vuln/detail/CVE-2021-29482
• https://github.com/ulikunitz/xz/issues/35
• https://pkg.go.dev/vuln/GO-2020-0016