NVD Vulnerability Detail

CVE-2021-31439

Summary	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation Manager. Authentication is not required to exploit this vulnerablity. The specific flaw exists within the processing of DSI structures in Netatalk. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-12326.
Publication Date	May 22, 2021, 12:15 a.m.
Registration Date	May 22, 2021, 10 a.m.
Last Update	Nov. 21, 2024, 3:05 p.m.

Affected software configurations

Configuration1		or higher	or less	more than	less than
cpe:2.3:a:synology:diskstation_manager::::::::		6.2			6.2.3-25426-3

Configuration3		or higher	or less	more than	less than
cpe:2.3:a:netatalk:netatalk::::::::					3.1.13

Related information, measures and tools

No	URL	タグ
1	https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html	Mailing List Third Party Advisory
2	https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html	Mailing List Third Party Advisory
3	https://security.gentoo.org/glsa/202311-02	Issue Tracking Third Party Advisory
4	https://security.gentoo.org/glsa/202311-02	Issue Tracking Third Party Advisory
5	https://www.debian.org/security/2023/dsa-5503	Third Party Advisory
6	https://www.debian.org/security/2023/dsa-5503	Third Party Advisory
7	https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26	Vendor Advisory
8	https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26	Vendor Advisory
9	https://www.zerodayinitiative.com/advisories/ZDI-21-492/	Third Party Advisory VDB Entry
10	https://www.zerodayinitiative.com/advisories/ZDI-21-492/	Third Party Advisory VDB Entry

Common Vulnerabilities List

No	CWE	Name	URL
1	CWE-787	境界外書き込み	https://cwe.mitre.org/data/definitions/787.html

JVN Vulnerability Information

Synology DiskStation Manager におけるヒープベースのバッファオーバーフローの脆弱性

Title	Synology DiskStation Manager におけるヒープベースのバッファオーバーフローの脆弱性
Summary	Synology DiskStation Manager には、ヒープベースのバッファオーバーフローの脆弱性が存在します。 Zero Day Initiative は、本脆弱性に ZDI-CAN-12326 を採番していました。
Possible impacts	情報を取得される、情報を改ざんされる、およびサービス運用妨害 (DoS) 状態にされる可能性があります。
Solution	ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。
Publication Date	April 29, 2021, midnight
Registration Date	Feb. 3, 2022, 6:04 p.m.
Last Update	Feb. 3, 2022, 6:04 p.m.

Affected System

Synology Inc.

DiskStation Manager

CVE (情報セキュリティ共通脆弱性識別子)

No	Name	URL
Common Vulnerabilities and Exposures (CVE)
1	CVE-2021-31439	https://www.cve.org/CVERecord?id=CVE-2021-31439
National Vulnerability Database (NVD)
2	CVE-2021-31439	https://nvd.nist.gov/vuln/detail/CVE-2021-31439

CWE (共通脆弱性タイプ一覧)

No	Name	URL
JVNDB
1	CWE-122	https://cwe.mitre.org/data/definitions/122.html

ベンダー情報

No	Name	URL
Synology Product Security Advisory
1	Synology-SA-20:26 DSM	https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26

その他

No	Name	URL
関連文書
1	ZDI-21-492 (Synology DiskStation Manager Netatalk dsi_doff Heap-based Buffer Overflow Remote Code Execution Vulnerability)	https://www.zerodayinitiative.com/advisories/ZDI-21-492/

Change Log

No	Changed Details	Date of change
1	[2022年02月03日] 掲載	Feb. 3, 2022, 6:04 p.m.