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CVE-2020-14871

Status Candidate

Overview

Vulnerability in the Oracle Solaris product of Oracle Systems (component: Pluggable authentication module). Supported versions that are affected are 10 and 11. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Solaris. While the vulnerability is in Oracle Solaris, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in takeover of Oracle Solaris. Note: This CVE is not exploitable for Solaris 11.1 and later releases, and ZFSSA 8.7 and later releases, thus the CVSS Base Score is 0.0. CVSS 3.1 Base Score 10.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Related Files

Oracle Solaris SunSSH PAM parse_user_name() Buffer Overflow
Posted Dec 17, 2020
Authored by wvu, Hacker Fantastic, Jeffrey Martin, Aaron Carreras, Jacob Thompson | Site metasploit.com

This Metasploit module exploits a stack-based buffer overflow in the Solaris PAM library's username parsing code, as used by the SunSSH daemon when the keyboard-interactive authentication method is specified. Tested against SunSSH 1.1.5 on Solaris 10u11 1/13 (x86) in VirtualBox, VMware Fusion, and VMware Player. Bare metal untested. Your addresses may vary.

tags | exploit, overflow, x86
systems | solaris
advisories | CVE-2020-14871
MD5 | 10f67723ac23f05d8cba2e16ff2e467a
Solaris SunSSH 11.0 x86 libpam Remote Root
Posted Dec 15, 2020
Authored by Hacker Fantastic

Solaris SunSSH versions 10 through 11.0 on x86 libpam remote root exploit.

tags | exploit, remote, x86, root
systems | solaris
advisories | CVE-2020-14871
MD5 | 8fbea7fde1a23252954cc85134e98724
SunSSH Solaris 10.0 / 11.0 x86 Remote Root
Posted Nov 9, 2020
Authored by Hacker Fantastic

A trivial to reach stack-based buffer overflow is present in libpam on Solaris. The vulnerable code exists in pam_framework.c parse_user_name() which allocates a fixed size buffer of 512 bytes on the stack and parses a username supplied to PAM modules (such as authtok_get used by SunSSH). This issue can be reached remotely pre-authentication via SunSSH when "keyboard-interactive" is enabled to use PAM based authentication. The vulnerability was discovered being actively exploited by FireEye in the wild and is part of an APT toolkit called "EVILSUN". The vulnerability is present in both SPARC/x86 versions of Solaris and others (eg. illumos). This exploit uses ROP gadgets to disable nxstack through mprotect on x86 and a helper shellcode stub. Tested against latest Solaris 10 without patch applied and the configuration is vulnerable in a default vanilla install. This exploit requires libssh2, the vulnerability has been identified and confirmed reachable on Solaris 10 through 11.0.

tags | exploit, overflow, x86, shellcode
systems | solaris
advisories | CVE-2020-14871
MD5 | 3fbcd0fdda16b92f50dc244f60276db1
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