FreeBSD 9.2 Sendfile Length information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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3.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in FreeBSD 9.2 and classified as problematic. This impacts an unknown function of the component Sendfile Length Handler. This manipulation causes information disclosure. This vulnerability is registered as CVE-2013-5666. Furthermore, an exploit is available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in FreeBSD 9.2 (Operating System). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component Sendfile Length Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. The summary by CVE is:

The sendfile system-call implementation in sys/kern/uipc_syscalls.c in the kernel in FreeBSD 9.2-RC1 and 9.2-RC2 does not properly pad transmissions, which allows local users to obtain sensitive information (kernel memory) via a length greater than the length of the file.

The weakness was published 09/10/2013 as FreeBSD-SA-13:11 as not defined advisory (Website). It is possible to read the advisory at freebsd.org. This vulnerability is known as CVE-2013-5666 since 08/31/2013. The exploitation appears to be easy. Attacking locally is a requirement. A single authentication is necessary for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept.

Applying the patch sendfile-9.2-rc.patch is able to eliminate this problem. The bugfix is ready for download at security.FreeBSD.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 (87014), SecurityFocus (BID 62308†), OSVDB (97142†) and Vulnerability Center (SBV-41487†). Additional details are provided at krebsonsecurity.com. Similar entries are available at VDB-10188, VDB-10189, VDB-10190 and VDB-10191. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.3
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: sendfile-9.2-rc.patch

Timelineinfo

08/31/2013 🔍
09/10/2013 +10 days 🔍
09/10/2013 +0 days 🔍
09/10/2013 +0 days 🔍
09/10/2013 +0 days 🔍
09/10/2013 +0 days 🔍
09/11/2013 +1 days 🔍
09/12/2013 +1 days 🔍
09/23/2013 +11 days 🔍
05/24/2021 +2800 days 🔍

Sourcesinfo

Product: freebsd.org

Advisory: FreeBSD-SA-13:11
Status: Not defined
Confirmation: 🔍

CVE: CVE-2013-5666 (🔍)
GCVE (CVE): GCVE-0-2013-5666
GCVE (VulDB): GCVE-100-10195
X-Force: 87014
SecurityFocus: 62308 - FreeBSD CVE-2013-5666 Information Disclosure Vulnerability
OSVDB: 97142
SecurityTracker: 1029013
Vulnerability Center: 41487 - FreeBSD Remote Information Disclosure Vulnerability via a Too Long File Length Passed to Sendfile(2), Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍
See also: 🔍

Entryinfo

Created: 09/11/2013 11:20
Updated: 05/24/2021 09:38
Changes: 09/11/2013 11:20 (70), 05/11/2017 08:43 (2), 05/24/2021 09:38 (3)
Complete: 🔍
Committer: olku
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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