Vulnerability Report

CVE-2021-31439

RCE

Title: Synology DiskStation Manager Netatalk DSI Heap Buffer Overflow

RCE

Proof Of Concept

No public PoC currently indexed for CVE-2021-31439.

CWE Category CWE-787
Published Date May 21, 2021
Modified Date Jan 14, 2025
Exploit Status Not Found
Score 8.8 CVSS v3.1
Exploit Probability (EPSS)
2.33%

Vulnerability Summary

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.

Impacted Vendors

N
netatalk 1

Reference Links

https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html https://security.gentoo.org/glsa/202311-02 https://www.debian.org/security/2023/dsa-5503 https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26 https://www.zerodayinitiative.com/advisories/ZDI-21-492/ https://lists.debian.org/debian-lts-announce/2023/05/msg00018.html https://security.gentoo.org/glsa/202311-02 https://www.debian.org/security/2023/dsa-5503 https://www.synology.com/zh-hk/security/advisory/Synology_SA_20_26 https://www.zerodayinitiative.com/advisories/ZDI-21-492/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v3.0
Source Entity [email protected]
Severity HIGH
8.8
Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.8
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:A/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-31439 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector ADJACENT_NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.