Zerologon is a vulnerability in Microsoft's Netlogon Remote Procedural Call (MS-NRPC) protocol. Specifically, this vulnerability occurs due to an incorrect implementation of the AES-128 Counter Feedback mode of operation. This vulnerability was given a CVSS score of 10 by Microsoft and can be carried out by anyone with a foothold in the network. This paper aims to explain the detail and working of MS-NRPC protocol, its vulnerability, and finally cover how to exploit it, something which the original paper by Secura left out.
941b59db31d2ceb9c4233ac44fa7d62aGentoo Linux Security Advisory 202012-24 - Multiple vulnerabilities have been found in Samba, the worst of which could result in a Denial of Service condition. Versions less than 4.12.9 are affected.
5bb991544b7b094ea08997f5d5fa0908Red Hat Security Advisory 2020-5439-01 - Samba is an open-source implementation of the Server Message Block protocol and the related Common Internet File System protocol, which allow PC-compatible machines to share files, printers, and various information. Issues addressed include a memory leak vulnerability.
09ad68c5da84561a3ab39c5abc59b5c7Proof of concept exploit for the ZeroLogin Netlogon privilege escalation vulnerability.
ea7695085892f1f97ad5522bc93d5d3bUbuntu Security Notice 4559-1 - Tom Tervoort discovered that the Netlogon protocol implemented by Samba incorrectly handled the authentication scheme. A remote attacker could use this issue to forge an authentication token and steal the credentials of the domain admin. While a previous security update fixed the issue by changing the "server schannel" setting to default to "yes", instead of "auto", which forced a secure netlogon channel, this update provides additional improvements. Various other issues were also addressed.
f57c43c56dc64d4f2d620467cfd5a8fcUbuntu Security Notice 4510-2 - USN-4510-1 fixed a vulnerability in Samba. This update provides the corresponding update for Ubuntu 14.04 ESM. Tom Tervoort discovered that the Netlogon protocol implemented by Samba incorrectly handled the authentication scheme. A remote attacker could use this issue to forge an authentication token and steal the credentials of the domain admin. Various other issues were also addressed.
2ed34d2ad5e9cf444a3751d103669b60Ubuntu Security Notice 4510-1 - Tom Tervoort discovered that the Netlogon protocol implemented by Samba incorrectly handled the authentication scheme. A remote attacker could use this issue to forge an authentication token and steal the credentials of the domain admin. This update fixes the issue by changing the "server schannel" setting to default to "yes", instead of "auto", which will force a secure netlogon channel. This may result in compatibility issues with older devices. A future update may allow a finer-grained control over this setting. Various other issues were also addressed.
0b446579b7c7dc87b52c723cb2687955Proof of concept exploit for the Windows Zerologon vulnerability as noted in CVE-2020-1472. By default, it changes the password of the domain controller account.
1d075193b9c51dbeb9ca38bebe03fe52Oracle Solaris 11 Device Driver Utility version 1.3.1 suffers from an insecure use of /tmp that can allow for a race condition which leads to privilege escalation. Included exploit provides a root shell.
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