What is the CVSS score of CVE-2019-18930?

CVE-2019-18930 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 3.2%.

Is there a public PoC exploit available for CVE-2019-18930?

Yes, a public proof-of-concept exploit is available for CVE-2019-18930. Prioritise patching immediately. EPSS: 3.2%.

My Cloud Ex2 Ultra Firmware CVE-2019-18930

HIGH

Out-of-bounds Write (CWE-787)

2019-11-13 cve@mitre.org

Buffer Overflow RCE Memory Corruption My Cloud Ex2 Ultra Firmware

8.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Nov 13, 2019 - 16:15 nvd

HIGH 8.8

DescriptionNVD

Western Digital My Cloud EX2 Ultra firmware 2.31.183 allows web users (including guest account) to remotely execute arbitrary code via a stack-based buffer overflow. There is no size verification logic in one of functions in libscheddl.so, and download_mgr.cgi makes it possible to enter large-sized f_idx inputs.

AnalysisAI

Western Digital My Cloud EX2 Ultra firmware 2.31.183 allows web users (including guest account) to remotely execute arbitrary code via a stack-based buffer overflow. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. Western Digital My Cloud EX2 Ultra firmware 2.31.183 allows web users (including guest account) to remotely execute arbitrary code via a stack-based buffer overflow. There is no size verification logic in one of functions in libscheddl.so, and download_mgr.cgi makes it possible to enter large-sized f_idx inputs. Affected products include: Western Digital My Cloud Ex2 Ultra Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).