Linux Kernel 2.6.16.9 null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

A vulnerability was found in Linux Kernel 2.6.16.9 (Operating System). It has been classified as critical. This affects an unknown code. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

net/dns_resolver/dns_key.c in the Linux kernel before 2.6.38 allows remote DNS servers to cause a denial of service (NULL pointer dereference and OOPS) by not providing a valid response to a DNS query, as demonstrated by an erroneous grand.centrall.org query, which triggers improper handling of error data within a DNS resolver key.

The issue has been introduced in 03/20/2006. The weakness was shared 10/04/2011 by David Howells (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2011-1076 since 02/24/2011. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/23/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 2024 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 55591 (Ubuntu 11.04 : linux vulnerabilities (USN-1167-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (55591). The entries 61070 and 60947 are related to this item.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.5
VulDB Temp Score: 7.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 55591
Nessus Name: Ubuntu 11.04 : linux vulnerabilities (USN-1167-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 840699
OpenVAS Name: Ubuntu Update for linux USN-1167-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: 1362fa078dae16776cd439791c6605b224ea6171

Timelineinfo

03/20/2006 🔍
02/24/2011 +1802 days 🔍
03/04/2011 +8 days 🔍
03/04/2011 +0 days 🔍
03/04/2011 +0 days 🔍
03/06/2011 +2 days 🔍
10/04/2011 +212 days 🔍
10/04/2011 +0 days 🔍
03/23/2015 +1266 days 🔍
11/23/2021 +2437 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-1167-1
Researcher: David Howells
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1076 (🔍)
SecurityTracker: 1025162 - Linux Kernel dns_resolver Key Processing Error Lets Local Users Deny Service
Vulnerability Center: 30130 - Linux kernel 2.6.37.2 and Prior Local DoS Vulnerability, Low
SecurityFocus: 46732 - Linux Kernel 'dns_key.c' NULL Pointer Dereference Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 11/23/2021 09:20
Changes: 03/23/2015 16:50 (56), 03/17/2017 07:33 (18), 11/23/2021 09:17 (4), 11/23/2021 09:20 (2)
Complete: 🔍

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