Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTIzNjctYzI5Ni0zbXAy

Arbitrary file overwrite in tar-rs

When unpacking a tarball with the unpack_in-family of functions it's intended that only files within the specified directory are able to be written. Tarballs with hard links or symlinks, however, can be used to overwrite any file on the filesystem. Tarballs can contain multiple entries for the same file. A tarball which first contains an entry for a hard link or symlink pointing to any file on the filesystem will have the link created, and then afterwards if the same file is listed in the tarball the hard link will be rewritten and any file can be rewritten on the filesystem.

Permalink: https://github.com/advisories/GHSA-2367-c296-3mp2
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLTIzNjctYzI5Ni0zbXAy
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 3 years ago
Updated: over 1 year ago

CVSS Score: 7.5
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Percentage: 0.00084
EPSS Percentile: 0.36525

Identifiers: GHSA-2367-c296-3mp2, CVE-2018-20990
References:

• https://nvd.nist.gov/vuln/detail/CVE-2018-20990
• https://github.com/alexcrichton/tar-rs/pull/156
• https://rustsec.org/advisories/RUSTSEC-2018-0002.html
• https://github.com/alexcrichton/tar-rs/commit/54651a87ae6ba7d81fcc72ffdee2ea7eca2c7e85
• https://github.com/advisories/GHSA-2367-c296-3mp2

Repository: https://github.com/alexcrichton/tar-rs
Blast Radius: 31.5

Affected Packages