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GHSA-64jh-cjwc-w8q6: snapd failed to properly check the file type when extracting a snap

In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.

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  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. CVE-2024-29068

snapd failed to properly check the file type when extracting a snap

Moderate severity GitHub Reviewed Published Jul 25, 2024 to the GitHub Advisory Database • Updated Jul 26, 2024

Package

gomod github.com/snapcore/snapd (Go)

In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.

References

  • https://nvd.nist.gov/vuln/detail/CVE-2024-29068
  • snapcore/snapd#13682
  • snapcore/snapd@b66fee8

Published to the GitHub Advisory Database

Jul 25, 2024

Last updated

Jul 26, 2024

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