CVE-2018-6851

7.8

HIGH

Sophos SafeGuard Enterprise Stack-based Buffer Overflow

Description

Sophos SafeGuard Enterprise before 8.00.5, SafeGuard Easy before 7.00.3, and SafeGuard LAN Crypt before 3.95.2 are vulnerable to Local Privilege Escalation via IOCTL 0x80206040. By crafting an input buffer we can control the execution path to the point where the constant DWORD 0 will be written to a user-controlled address. We can take advantage of this condition to zero-out the pointer to the security descriptor in the object header of a privileged process or modify the security descriptor itself and run code in the context of a process running as SYSTEM.

INFO

Published Date :

July 9, 2018, 6:29 p.m.

Last Modified :

Oct. 3, 2019, 12:03 a.m.

Source :

[email protected]

Remotely Exploitable :

No

Impact Score :

5.9

Exploitability Score :

1.8 Public PoC/Exploit Available at Github

CVE-2018-6851 has a 3 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2018-6851 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product
1	Sophos	safeguard_easy_device_encryption_client
2	Sophos	safeguard_enterprise_client
3	Sophos	safeguard_lan_crypt_client

: Total Affected Vendor : 1 | Products : 3

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2018-6851.

URL	Resource
http://seclists.org/fulldisclosure/2018/Jul/20	Mailing List Third Party Advisory
https://community.sophos.com/kb/en-us/131934	Patch Vendor Advisory
https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/	Exploit Technical Description Third Party Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

lnick2023/nicenice

None

Updated: 1 year, 10 months ago

0 stars 0 fork 0 watcher

Born at : Jan. 11, 2023, 1:21 p.m. This repo has been linked 1042 different CVEs too.

xbl3/awesome-cve-poc_qazbnm456

None

Updated: 3 months ago

13 stars 4 fork 4 watcher

Born at : May 25, 2020, 7:51 a.m. This repo has been linked 1027 different CVEs too.

qazbnm456/awesome-cve-poc

✍️ A curated list of CVE PoCs.

awesome cve poc

Updated: 2 months ago

3289 stars 678 fork 678 watcher

Born at : Feb. 2, 2017, 6:43 a.m. This repo has been linked 1042 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2018-6851 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2018-6851 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by [email protected]

May. 14, 2024

Action	Type	Old Value	New Value

CWE Remap by [email protected]

Oct. 03, 2019

Action	Type	Old Value	New Value
Changed	CWE	CWE-264 CWE-264	CWE-119

Initial Analysis by [email protected]

Sep. 07, 2018

Action	Type	Old Value	New Value
Added	CVSS V2		(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Added	CVSS V3		AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Changed	Reference Type	https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ No Types Assigned	https://labs.nettitude.com/blog/cve-2018-6851-to-cve-2018-6857-sophos-privilege-escalation-vulnerabilities/ Exploit, Technical Description, Third Party Advisory
Changed	Reference Type	http://seclists.org/fulldisclosure/2018/Jul/20 No Types Assigned	http://seclists.org/fulldisclosure/2018/Jul/20 Mailing List, Third Party Advisory
Changed	Reference Type	https://community.sophos.com/kb/en-us/131934 No Types Assigned	https://community.sophos.com/kb/en-us/131934 Patch, Vendor Advisory
Added	CWE		CWE-264
Added	CPE Configuration		OR cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.00::::::: cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:6.10::::::: cpe:2.3:a:sophos:safeguard_easy_device_encryption_client:7.00::::::: cpe:2.3:a:sophos:safeguard_enterprise_client:5.60.3:vs-nfd::::::* cpe:2.3:a:sophos:safeguard_enterprise_client:6.00::::::: cpe:2.3:a:sophos:safeguard_enterprise_client:6.00.1::::::: cpe:2.3:a:sophos:safeguard_enterprise_client:6.10::::::: cpe:2.3:a:sophos:safeguard_enterprise_client:7.00::::::: cpe:2.3:a:sophos:safeguard_enterprise_client:8.00::::::: cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.1:ts::::::* cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.90.2::::::: cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1::::::: cpe:2.3:a:sophos:safeguard_lan_crypt_client:3.95.1:ts::::::*

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2018-6851 is associated with the following CWEs:

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2018-6851 weaknesses.

CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow CAPEC-42: MIME Conversion MIME Conversion CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion CAPEC-100: Overflow Buffers Overflow Buffers CAPEC-123: Buffer Manipulation Buffer Manipulation

CVE-2018-6851

Sophos SafeGuard Enterprise Stack-based Buffer Overflow

Description

INFO

July 9, 2018, 6:29 p.m.

Oct. 3, 2019, 12:03 a.m.

[email protected]

No

5.9

1.8

Public PoC/Exploit Available at Github

Affected Products

References to Advisories, Solutions, and Tools

lnick2023/nicenice

xbl3/awesome-cve-poc_qazbnm456

qazbnm456/awesome-cve-poc

CVE Modified by [email protected]

CWE Remap by [email protected]

Initial Analysis by [email protected]

CWE - Common Weakness Enumeration

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

0.04 }} 0.00%

0.05635

CVSS30 - Vulnerability Scoring System

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