Linux Kernel up to 2.6.38.8 do_replace input validation

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

A vulnerability classified as problematic was found in Linux Kernel up to 2.6.38.8 (Operating System). This vulnerability affects the function do_replace. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality. CVE summarizes:

The do_replace function in net/bridge/netfilter/ebtables.c in the Linux kernel before 2.6.39 does not ensure that a certain name field ends with a \0 character, which allows local users to obtain potentially sensitive information from kernel stack memory by leveraging the CAP_NET_ADMIN capability to replace a table, and then reading a modprobe command line.

The issue has been introduced in 03/14/2011. The weakness was released 06/21/2012 (Website). The advisory is available at github.com. This vulnerability was named CVE-2011-1080. The exploitation appears to be easy. Local access is required to approach this attack. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/05/2021).

The vulnerability was handled as a non-public zero-day exploit for at least 465 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 67081 (CentOS 5 : kernel (CESA-2011:0833)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CentOS Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165567 (SUSE Enterprise Linux Security Update Linux Kernel (SUSE-SA:2011:031)).

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 databases at X-Force (65847) and Tenable (67081). Entries connected to this vulnerability are available at 57033, 61065, 61064 and 57962.

Productinfo

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Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

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

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 67081
Nessus Name: CentOS 5 : kernel (CESA-2011:0833)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 69970
OpenVAS Name: Debian Security Advisory DSA 2264-1 (linux-2.6)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: d846f71195d57b0bbb143382647c2c6638b04c5a

Timelineinfo

02/14/2011 🔍
02/24/2011 +9 days 🔍
03/01/2011 +5 days 🔍
03/14/2011 +13 days 🔍
08/03/2011 +142 days 🔍
06/21/2012 +323 days 🔍
06/21/2012 +0 days 🔍
03/23/2015 +1005 days 🔍
12/05/2021 +2449 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: RHSA-2011:0833
Status: Not defined
Confirmation: 🔍

CVE: CVE-2011-1080 (🔍)
OVAL: 🔍
IAVM: 🔍

X-Force: 65847
Vulnerability Center: 32540 - Linux Kernel <=2.6.38-rc2 Local Information Disclosure Vulnerability via the 'do_replace()\x27 Function, Medium
SecurityFocus: 46616 - Linux Kernel Multiple Local Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 12/05/2021 09:09
Changes: 03/23/2015 16:50 (63), 03/29/2017 10:58 (11), 12/05/2021 09:02 (7), 12/05/2021 09:06 (1), 12/05/2021 09:09 (2)
Complete: 🔍

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