What is the CVSS score of CVE-2021-39538?

CVE-2021-39538 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.6%.

Is there a public PoC exploit available for CVE-2021-39538?

Yes, a public proof-of-concept exploit is available for CVE-2021-39538. Prioritise patching immediately. EPSS: 0.6%.

Pdftools CVE-2021-39538

MEDIUM

NULL Pointer Dereference (CWE-476)

2021-09-20 cve@mitre.org

Null Pointer Dereference Denial Of Service Pdftools

5.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Sep 20, 2021 - 16:15 nvd

MEDIUM 5.5

DescriptionNVD

An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function node::ObjNode::Value() located in objnode.cpp. It allows an attacker to cause Denial of Service.

AnalysisAI

An issue was discovered in pdftools through 20200714. Rated medium severity (CVSS 5.5), this vulnerability is no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. An issue was discovered in pdftools through 20200714. A NULL pointer dereference exists in the function node::ObjNode::Value() located in objnode.cpp. It allows an attacker to cause Denial of Service. Affected products include: Pdftools Project Pdftools. Version information: through 20200714..

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.