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Debian LTS Advisory DLA-3237-1 debian-lts@lists.debian.org
https://www.debian.org/lts/security/ Guilhem Moulin
December 12, 2022 https://wiki.debian.org/LTS
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Package : node-tar
Version : 4.4.6+ds1-3+deb10u2
CVE ID : CVE-2021-37701 CVE-2021-37712
Debian Bug : 993981
Cache poisoning vulnerabilities were found in node-tar, a Node.js module
used to read and write portable tar archives, which may result in
arbitrary file creation or overwrite.
CVE-2021-37701
It was discovered that node-tar performed insufficient symlink
protection, thereby making directory cache vulnerable to poisoning
using symbolic links.
Upon extracting an archive containing a directory 'foo/bar' followed
with a symbolic link 'foo\\bar' to an arbitrary location, node-tar
would extract arbitrary files into the symlink target, thus allowing
arbitrary file creation and overwrite.
Moreover, on case-insensitive filesystems, a similar issue occurred
with a directory 'FOO' followed with a symbolic link 'foo'.
CVE-2021-37712
Similar to CVE-2021-37701, a specially crafted tar archive
containing two directories and a symlink with names containing
unicode values that normalized to the same value, would bypass
node-tar's symlink checks on directories, thus allowing arbitrary
file creation and overwrite.
For Debian 10 buster, these problems have been fixed in version
4.4.6+ds1-3+deb10u2.
We recommend that you upgrade your node-tar packages.
For the detailed security status of node-tar please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/node-tar
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
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