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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/source-package/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

Debian LTS: DLA-3237-1: node-tar security update

December 12, 2022
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

Summary

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/source-package/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


Severity
Package : node-tar
Version : 4.4.6+ds1-3+deb10u2
CVE ID : CVE-2021-37701 CVE-2021-37712
Debian Bug : 993981

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