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GitHubrossengeorgiev/salt-security-backports

salt-security-backports

Salt security backports for CVE-2020-11651 & CVE-2020-11652

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10815106 years agoNot yet reviewed
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Official patches for previous versions can be requested at: https://www.saltstack.com/lp/request-patch-april-2020/

⚠ Patches here are custom, and may differ from official ones ⚠

Backported security patches for unsupported salt versions

Build Status

Patches in this repo address the following CVEs:

  • CVE-2020-11651 & CVE-2020-11652 - https://labs.f-secure.com/advisories/saltstack-authorization-bypass

Additionally include the following bugfixes:

  • fix typo _minion_runner -> minion_runner. See: https://docs.saltstack.com/en/latest/topics/releases/3000.2.html#known-issue
  • fix type _find_file_and_stat -> _find_hash_and_stat. See https://github.com/rossengeorgiev/salt-security-backports/issues/1
  • removal of run_func from whitelist
  • missing import salt.utils.verify

    • Above fixed are included in latest release of SaltStack, specifically v2019.2.5 and v3000.3.

    Check if your salt-master is vulnerable

    Check script needs to be ran locally on your salt-master as root

    root@kitploit:~
    python salt-cve-check.py

    Example output for Salt 2017.7.8:

    root@kitploit:~
    [+] Salt version: 2017.7.8
[ ] This version of salt is vulnerable! Check results below
[+] Checking salt-master (127.0.0.1:4506) status... ONLINE
[+] Checking if vulnerable to CVE-2020-11651... YES
[+] Checking if vulnerable to CVE-2020-11652 (read_token)... YES
[+] Checking if vulnerable to CVE-2020-11652 (read)... YES
[+] Checking if vulnerable to CVE-2020-11652 (write1)... YES
[+] Checking if vulnerable to CVE-2020-11652 (write2)... YES

    Applying the patches

    root@kitploit:~
    # locate the salt package directory (use python3 if necessary)

python -c "import imp; print(imp.find_module('salt')[1])"

# in my case: /usr/lib/python2.7/dist-packages/salt
# apply patches
# (adding -b flag will backup file before modifications at same path with .orig suffix)
# (patch can be reversed running the same command with -R flag)

patch -p2 -d /usr/lib/python2.7/dist-packages/salt < 2017.7.8_CVE-2020-11651.patch
patch -p2 -d /usr/lib/python2.7/dist-packages/salt < 2017.7.8_CVE-2020-11652.patch

# restart salt-master

systemctl restart salt-master
# or
service salt-master restart

    Rerun the check script:

    root@kitploit:~
    user@salt # python salt-cve-check.py
[+] Salt version: 2017.7.8
[ ] This version of salt is vulnerable! Check results below
[+] Checking salt-master (127.0.0.1:4506) status... ONLINE
[+] Checking if vulnerable to CVE-2020-11651... NO
[+] Checking if vulnerable to CVE-2020-11652 (read_token)... NO
[+] Checking if vulnerable to CVE-2020-11652 (read)... NO
[+] Checking if vulnerable to CVE-2020-11652 (write1)... NO
[+] Checking if vulnerable to CVE-2020-11652 (write2)... NO
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