Yandex Browser prior 22.5.0.862 on Windows Installation File symlink

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

A vulnerability has been found in Yandex Browser on Windows and classified as critical. This vulnerability affects an unknown function of the component Installation File Handler. The manipulation with an unknown input leads to a symlink vulnerability. The CWE definition for the vulnerability is CWE-61. The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Local privilege vulnerability in Yandex Browser for Windows prior to 22.5.0.862 allows a local, low privileged, attacker to execute arbitary code with the SYSTEM privileges through manipulating symlinks to installation file during Yandex Browser update process.

The weakness was released 06/16/2022. The advisory is shared for download at yandex.com. This vulnerability was named CVE-2021-25261 since 01/15/2021. There are neither technical details nor an exploit publicly available.

Upgrading to version 22.5.0.862 eliminates this vulnerability.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

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

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Symlink
CWE: CWE-61 / CWE-59
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Browser 22.5.0.862

Timelineinfo

01/15/2021 🔍
06/16/2022 +516 days 🔍
06/16/2022 +0 days 🔍
06/16/2022 +0 days 🔍

Sourcesinfo

Advisory: yandex.com
Status: Confirmed

CVE: CVE-2021-25261 (🔍)

Entryinfo

Created: 06/16/2022 09:35
Changes: 06/16/2022 09:35 (40)
Complete: 🔍

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