Linux Kernel 3.14-rc7 nfnetlink_queue_core.c skb_zerocopy resource management

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel 3.14-rc7. It has been declared as problematic. This issue affects the function skb_zerocopy of the file net/netfilter/nfnetlink_queue_core.c. Executing a manipulation can lead to resource management. This vulnerability is handled as CVE-2014-2568. There is not any exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel 3.14-rc7 (Operating System) and classified as problematic. This vulnerability affects the function skb_zerocopy of the file net/netfilter/nfnetlink_queue_core.c. The manipulation with an unknown input leads to a resource management vulnerability. The CWE definition for the vulnerability is CWE-399. As an impact it is known to affect confidentiality. CVE summarizes:

Use-after-free vulnerability in the nfqnl_zcopy function in net/netfilter/nfnetlink_queue_core.c in the Linux kernel through 3.13.6 allows attackers to obtain sensitive information from kernel memory by leveraging the absence of a certain orphaning operation. NOTE: the affected code was moved to the skb_zerocopy function in net/core/skbuff.c before the vulnerability was announced.

The weakness was released 03/20/2014 by Zoltan Kiss with Citrix as kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied as confirmed mailinglist post (oss-sec). The advisory is shared for download at seclists.org. This vulnerability was named CVE-2014-2568 since 03/20/2014. The exploitation appears to be easy. The attack needs to be approached locally. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The advisory points out:

Once the source skb is consumed, ubuf destructor is called and potentially releases the corresponding userspace buffers, which can then for example be repurposed, while the destination skb is still pointing to the them.

The vulnerability scanner Nessus provides a plugin with the ID 74360 (Ubuntu 14.04 LTS : linux vulnerabilities (USN-2240-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168480 (OpenSuSE Security Update for the Linux Kernel (openSUSE-SU-2016:0301-1)).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lkml.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (91922), Tenable (74360), SecurityFocus (BID 66348†), Secunia (SA58298†) and Vulnerability Center (SBV-45268†). Entries connected to this vulnerability are available at VDB-74643, VDB-75705 and VDB-75706. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 3.5

VulDB Base Score: 4.0
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 74360
Nessus Name: Ubuntu 14.04 LTS : linux vulnerabilities (USN-2240-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 867663
OpenVAS Name: Fedora Update for kernel FEDORA-2014-4675
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: lkml.org

Timelineinfo

03/20/2014 🔍
03/20/2014 +0 days 🔍
03/20/2014 +0 days 🔍
03/20/2014 +0 days 🔍
03/21/2014 +1 days 🔍
03/24/2014 +3 days 🔍
03/24/2014 +0 days 🔍
05/14/2014 +51 days 🔍
06/06/2014 +23 days 🔍
07/07/2014 +31 days 🔍
05/08/2026 +4323 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: kernel: net: potential information leak when ubuf backed skbs are skb_zerocopy()ied
Researcher: Zoltan Kiss
Organization: Citrix
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-2568 (🔍)
GCVE (CVE): GCVE-0-2014-2568
GCVE (VulDB): GCVE-100-12676

OVAL: 🔍

X-Force: 91922 - Linux Kernel skb_zerocopy() information disclosure, Low Risk
SecurityFocus: 66348 - Linux Kernel CVE-2014-2568 Information Disclosure Vulnerability
Secunia: 58298 - Linux Kernel "nfqnl_zcopy()" Information Disclosure Vulnerability, Not Critical
Vulnerability Center: 45268 - Linux Kernel <=3.13.6 Local Network Information Disclosure in Skb_zerocopy Function, Low

See also: 🔍

Entryinfo

Created: 03/24/2014 09:24
Updated: 05/08/2026 23:38
Changes: 03/24/2014 09:24 (85), 06/01/2017 08:11 (4), 06/16/2021 08:40 (3), 05/08/2026 23:38 (15)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!