AccountsService on Ubuntu 0010-set-language.patch user_change_language_authorized_cb fallback_locale memory corruption

HistoryDiffrelatejsonxmlCTI

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.
7.7	$0-$5k	0.00

Summaryinfo

A vulnerability was found in AccountsService on Ubuntu. It has been declared as critical. The affected element is the function user_change_language_authorized_cb of the file debian/patches/0010-set-language.patch. Executing a manipulation of the argument fallback_locale can lead to memory corruption. This vulnerability appears as CVE-2021-3939. The attacker needs to be present on the local network. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in AccountsService on Ubuntu and classified as critical. This vulnerability affects the function user_change_language_authorized_cb of the file debian/patches/0010-set-language.patch. The manipulation of the argument fallback_locale with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was presented 11/17/2021 as USN-5149-1. The advisory is shared for download at bugs.launchpad.net. This vulnerability was named CVE-2021-3939 since 11/09/2021. There are known technical details, but no exploit is available.

Upgrading to version 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3 or 0.6.55-0ubuntu14.1 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

AccountsService

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.8
CNA Vector (Canonical Ltd.): 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: AccountsService 0.6.55-0ubuntu12~20.04.5/0.6.55-0ubuntu13.3/0.6.55-0ubuntu14.1

Timelineinfo

11/09/2021 🔍
11/17/2021 +8 days 🔍
11/17/2021 +0 days 🔍
11/21/2021 +4 days 🔍

Sourcesinfo

Advisory: USN-5149-1
Status: Confirmed

CVE: CVE-2021-3939 (🔍)
GCVE (CVE): GCVE-0-2021-3939
GCVE (VulDB): GCVE-100-186808

Entryinfo

Created: 11/17/2021 21:48
Updated: 11/21/2021 07:50
Changes: 11/17/2021 21:48 (51), 11/21/2021 07:44 (1), 11/21/2021 07:50 (16)
Complete: 🔍
Cache ID: 216::103