Exploitalert - Database of Exploits

Sawmill Enterprise v8.7.9 Pass The Hash Authentication Bypass

CVE	Category	Price	Severity
CVE-2017-5496	CWE-287	$2,000	Critical

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2017-02-19

CPE
cpe:cpe:/a:sawmill:sawmill_enterprise:8.7.9

CVSS	EPSS	EPSSP
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Local	AV	The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope		S	An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2017020186

Sawmill Enterprise v8.7.9 Pass The Hash Authentication Bypass[+] Credits: John Page AKA Hyp3rlinx [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/SAWMILL-PASS-THE-HASH-AUTHENTICATION-BYPASS.txt [+] ISR: ApparitionSec Vendor: =============== www.sawmill.net Product: ======================== Sawmill Enterprise v8.7.9 sawmill8.7.9.4_x86_windows.exe hash: b7ec7bc98c42c4908dfc50450b4521d0 Sawmill is a powerful heirarchical log analysis tool that runs on every major platform. Vulnerability Type: =================================== Pass the Hash Authentication Bypass CVE Reference: ============== CVE-2017-5496 Security Issue: ===================== Sawmill suffers from a classic "Pass The Hash" vulnerability whereby an attacker who gains access to the hashed user account passwords can login to the Sawmill interface using the raw MD5 hash values, allowing attackers to bypass the work of offline cracking account password hashes. This issue usually is known to affect Windows systems e.g. (NT Pass the Hash/Securityfocus, 1997). However, this vulnerability can also present itself in a vulnerable Web application. Sawmill account password hashes are stored under LogAnalysisInfo/ directory in "users.cfg". e.g. users = { root_admin = { username = "admin" password_checksum = "e99a18c428cb38d5f260853678922e03" email_address = "" This config file is stored local to the Sawmill application. However, if an attacker gains access to a backup of the config that is stored in some other location that is then compromised, it can lead to subversion of Sawmills authenticaton process. Moreover, since 'users.cfg' file is world readble a regular non Admin Windows user who logs into the system running sawmill can now grab a password hash and easily login to the vulnerable application without the needing the password itself. How to test? Sawmill running (default port 8988), log off Windows and switch to a "Standard" Windows non Administrator user. 1) Open "users.cfg" under Sawmills directory "C:Program FilesSawmill 8LogAnalysisInfo" and copy the root_admin Admin password hash. 2) Go to the Sawmill login page in web browser http://VICTIM-IP:8988/ enter username 'admin' and the hash, Tada! your Admin. Finally, Sawmill passwords are hashed using vulnerable MD5 algorithm and no salt. e.g. password: abc123 MD5 hash: e99a18c428cb38d5f260853678922e03 Disclosure Timeline: ===================================== Vendor Notification: January 7, 2017 CVE-2017-5496 assigned : January 20 Request status : January 26 Vendor: Fix avail later in year still no ETA Inform vendor public disclose date February 18, 2017 : Public Disclosure Network Access: =============== Remote Impact: ====================== Information Disclosure Privilege Escalation Severity Level: ================ High [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere.

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