PT-2014-8309 · Linux+2 · Linux Kernel+2

Miloš Prchlík · Published 2014-11-24 · Updated 2023-02-13 · CVE-2014-7843

Positive Technologies (AI Summary)

CVSS v2.0

4.9

Medium

Base vector

AV:L/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 3.17.4

Description The issue allows local users to cause a denial of service, resulting in a system crash, by reading one byte beyond a /dev/zero page boundary. This is due to a problem in the clear user function.

Recommendations For Linux kernel versions prior to 3.17.4, update to version 3.17.4 or later to resolve the issue. As a temporary workaround, consider restricting access to the /dev/zero page to minimize the risk of exploitation.

Exploit

Fix

DoS

Weakness Enumeration

CWE-17

Related Identifiers

ALT-PU-2014-2381

ALT-PU-2015-1794

CVE-2014-7843

USN-2465-1

USN-2466-1

USN-2467-1

USN-2468-1

Affected Products

Alt Linux

Linux Kernel

Ubuntu

References · 29

• 🔥 https://github.com/retme7/CVE-2014-4322_poc · Exploit
• 🔥 https://github.com/panyu6325/CVE-2015-1805 · Exploit
• 🔥 https://github.com/laginimaineb/cve-2014-4322 · Exploit
• 🔥 https://github.com/marcograss/cve-2014-4323 · Exploit
• 🔥 https://github.com/FloatingGuy/cve-2015-1805 · Exploit
• 🔥 https://github.com/ireshchaminda1/Android-Privilege-Escalation-Remote-Access-Vulnerability-CVE-2015-1805 · Exploit
• https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-7843 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2466-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-2465-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2014-7843 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2014-7843 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2014-7843 · Security Note
• https://ubuntu.com/security/CVE-2014-7842 · Vendor Advisory
• https://ubuntu.com/security/CVE-2014-7841 · Vendor Advisory