CVE-2021-31439: Synology DiskStation Manager Netatalk dsi_doff Heap-based Buffer Overflow Remote Code Execution Vulnerability
First published: Fri May 21 2021(Updated: )
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation DS418play. 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.
Credit: zdi-disclosures@trendmicro.com zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Synology DiskStation Manager | >=6.2<6.2.3-25426-3 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Netatalk Netatalk | <3.1.13 | |
| debian/netatalk | <=3.1.12~ds-3 | 3.1.12~ds-3+deb10u4 3.1.12~ds-8+deb11u1 3.1.18~ds-1 |
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Reference Links
- https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26
- https://www.zerodayinitiative.com/advisories/ZDI-21-492/
- https://netatalk.sourceforge.io/3.1/ReleaseNotes3.1.13.html
- https://github.com/Netatalk/Netatalk/commit/779717df2ed39b701deaf2472b42d59ff50fab7f
- https://security-tracker.debian.org/tracker/CVE-2021-31439
- https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html
- https://www.debian.org/security/2023/dsa-5503
- https://security.gentoo.org/glsa/202311-02
Frequently Asked Questions
What is the vulnerability ID for this Synology DiskStation Manager vulnerability?
The vulnerability ID for this Synology DiskStation Manager vulnerability is CVE-2021-31439.
How severe is CVE-2021-31439?
CVE-2021-31439 has a severity rating of 8.8 out of 10.
How can this vulnerability be exploited?
This vulnerability can be exploited by network-adjacent attackers to execute arbitrary code on affected installations of Synology DiskStation Manager.
Is authentication required to exploit CVE-2021-31439?
No, authentication is not required to exploit CVE-2021-31439.
What is the affected software in this vulnerability?
The affected software in this vulnerability is Synology DiskStation Manager.
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