Buffer overflow in Netatalk
CVE-2021-31439
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.
Vulnerability class: Buffer Overflow
EPSS: 0.023 (81.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Netatalk
- Synology Diskstation Manager — versions 6.1.1-15101-4
- Synology Diskstation_manager
- Debian Debian_linux — versions 10.0, 11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory)
- zdi-disclosures@trendmicro.com (Vendor Advisory)
- zdi-disclosures@trendmicro.com (mailing-list, Mailing List, Third Party Advisory)
- zdi-disclosures@trendmicro.com (vendor-advisory, Third Party Advisory)
- zdi-disclosures@trendmicro.com (vendor-advisory, Third Party Advisory, Issue Tracking)
Frequently asked questions
- What is CVE-2021-31439?
- CVE-2021-31439 is a high-severity vulnerability in Netatalk, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2021-05-21.
- How severe is CVE-2021-31439?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-31439 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.