Linux Kernel up to 4.9.4 lib/iov_iter.c pipe_advance information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 4.9.4 and classified as problematic. Affected by this vulnerability is the function pipe_advance in the library lib/iov_iter.c. The manipulation leads to information disclosure. This vulnerability is known as CVE-2017-5550. The attack needs to be approached locally. There is no exploit available. It is recommended to upgrade the affected component. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Linux Kernel up to 4.9.4 (Operating System). Affected is the function pipe_advance in the library lib/iov_iter.c. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

Off-by-one error in the pipe_advance function in lib/iov_iter.c in the Linux kernel before 4.9.5 allows local users to obtain sensitive information from uninitialized heap-memory locations in opportunistic circumstances by reading from a pipe after an incorrect buffer-release decision.

The bug was discovered 02/06/2017. The weakness was shared 02/06/2017 (Website). The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2017-5550 since 01/20/2017. The attack needs to be approached locally. Required for exploitation is a authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

The vulnerability scanner Nessus provides a plugin with the ID 101929 (Ubuntu 16.04 LTS : linux-hwe vulnerabilities (USN-3361-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276417 (Fedora Security Update for kernel (FEDORA-2017-6cc158c193)).

Upgrading to version 4.9.5 eliminates this vulnerability. A possible mitigation has been published 6 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (101929) and SecurityFocus (BID 95716†). The entries VDB-96553, VDB-96554, VDB-96560 and VDB-96565 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 101929
Nessus Name: Ubuntu 16.04 LTS : linux-hwe vulnerabilities (USN-3361-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for linux-hwe USN-3361-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: Kernel 4.9.5
Patch: git.kernel.org

Timelineinfo

01/20/2017 🔍
01/20/2017 +0 days 🔍
02/06/2017 +17 days 🔍
02/06/2017 +0 days 🔍
02/06/2017 +0 days 🔍
02/06/2017 +0 days 🔍
07/21/2017 +165 days 🔍
07/24/2017 +3 days 🔍
11/11/2022 +1936 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: USN-3361-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-5550 (🔍)
GCVE (CVE): GCVE-0-2017-5550
GCVE (VulDB): GCVE-100-96564
SecurityFocus: 95716 - Linux Kernel CVE-2017-5550 Local Information Disclosure Vulnerability
OSVDB: - CVE-2017-5550 - Linux - Information Disclosure Issue

See also: 🔍

Entryinfo

Created: 02/06/2017 07:26 PM
Updated: 11/11/2022 06:02 PM
Changes: 02/06/2017 07:26 PM (69), 08/11/2020 09:57 AM (6), 11/11/2022 05:47 PM (3), 11/11/2022 05:54 PM (11), 11/11/2022 06:02 PM (1)
Complete: 🔍
Cache ID: 18:750:40

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