Kaspersky Anti-Virus up to 8.0.4 on Linux Quarantine input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Kaspersky Anti-Virus up to 8.0.4 on Linux. It has been classified as critical. Affected by this issue is some unknown functionality of the component Quarantine. Performing a manipulation results in input validation. This vulnerability is identified as CVE-2017-9811. The attack is only possible with local access. Additionally, an exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Kaspersky Anti-Virus up to 8.0.4 on Linux (Anti-Malware Software). It has been classified as critical. This affects an unknown code block of the component Quarantine. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The kluser is able to interact with the kav4fs-control binary in Kaspersky Anti-Virus for Linux File Server before Maintenance Pack 2 Critical Fix 4 (version 8.0.4.312). By abusing the quarantine read and write operations, it is possible to elevate the privileges to root.

The bug was discovered 06/28/2017. The weakness was released 07/17/2017 by Core Security with Core Security Consulting Services as confirmed mailinglist post (Full-Disclosure). It is possible to read the advisory at seclists.org. This vulnerability is uniquely identified as CVE-2017-9811 since 06/22/2017. Attacking locally is a requirement. The requirement for exploitation is a authentication. Technical details are unknown but a public exploit is available.

A public exploit has been developed by Core Security and been published even before and not after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 19 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 8.0.4.312 eliminates this vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (42269) and SecurityFocus (BID 99330†). Entries connected to this vulnerability are available at VDB-103730, VDB-103732 and VDB-103733. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.8
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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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: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: Core Security
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Anti-Virus 8.0.4.312

Timelineinfo

06/22/2017 🔍
06/28/2017 +6 days 🔍
06/28/2017 +0 days 🔍
06/28/2017 +0 days 🔍
06/29/2017 +1 days 🔍
07/17/2017 +18 days 🔍
07/17/2017 +0 days 🔍
07/18/2017 +1 days 🔍
01/06/2025 +2729 days 🔍

Sourcesinfo

Vendor: kaspersky.com

Advisory: 143190
Researcher: Core Security
Organization: Core Security Consulting Services
Status: Confirmed

CVE: CVE-2017-9811 (🔍)
GCVE (CVE): GCVE-0-2017-9811
GCVE (VulDB): GCVE-100-103731
SecurityFocus: 99330 - Kaspersky Anti-Virus for Linux File Server Multiple Security Vulnerabilities
SecurityTracker: 1038798

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

Entryinfo

Created: 07/18/2017 11:22
Updated: 01/06/2025 02:10
Changes: 07/18/2017 11:22 (75), 10/27/2019 07:40 (2), 01/01/2021 18:23 (2), 12/13/2022 08:45 (3), 01/06/2025 02:10 (14)
Complete: 🔍
Cache ID: 216::103

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

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