High severity8.8NVD Advisory· Published May 21, 2021· Updated Jun 17, 2026
CVE-2021-31439
CVE-2021-31439
Description
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.
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Affected products
8cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*range: >=6.2,<6.2.3-25426-3
- (no CPE)
- (no CPE)range: 6.1.1-15101-4
- osv-coords2 versionspkg:rpm/suse/netatalk&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/netatalk&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2012%20SP5
< 3.1.0-3.8.1+ 1 more
- (no CPE)range: < 3.1.0-3.8.1
- (no CPE)range: < 3.1.0-3.8.1
Patches
Vulnerability mechanics
References
5- lists.debian.org/debian-lts-announce/2023/05/msg00018.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202311-02nvdIssue TrackingThird Party Advisory
- www.debian.org/security/2023/dsa-5503nvdThird Party Advisory
- www.synology.com/zh-hk/security/advisory/Synology_SA_20_26nvdVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-492/nvdThird Party AdvisoryVDB Entry
News mentions
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