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Internet Graphics Server CVE-2018-2420

CRITICAL
Unrestricted Upload of File with Dangerous Type (CWE-434)
2018-05-09 cna@sap.com
9.8
CVSS 3.0 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK

2 techniques across 2 tactics: Command and Control, Persistence

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. No authentication is required to exploit this vulnerability.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 1.6% exploitation probability (EPSS)

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AnalysisAI

SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to upload any file (including script files) without proper file format validation. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the server. SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to upload any file (including script files) without proper file format validation. Affected products include: Sap Internet Graphics Server.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionNVD

SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to upload any file (including script files) without proper file format validation.

Threat Intelligence Overview

EPSS Score
1.6%
Top 27% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC No
EPSS 1.6%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

51
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.

Affected Products (CPE)NVD

cpe:2.3:a:sap:internet_graphics_server:7.20:*:*:*:*:*:*:*
cpe:2.3:a:sap:internet_graphics_server:7.20ext:*:*:*:*:*:*:*
cpe:2.3:a:sap:internet_graphics_server:7.45:*:*:*:*:*:*:*
cpe:2.3:a:sap:internet_graphics_server:7.49:*:*:*:*:*:*:*
cpe:2.3:a:sap:internet_graphics_server:7.53:*:*:*:*:*:*:*
CVE-2018-2393 HIGH POC
7.5 Feb 14

Under certain conditions SAP Internet Graphics Server (IGS) 7.20, 7.20EXT, 7.45, 7.49, 7.53, fails to validate XML Exter

CVE-2018-2392 HIGH POC
7.5 Feb 14

Under certain conditions SAP Internet Graphics Server (IGS) 7.20, 7.20EXT, 7.45, 7.49, 7.53, fails to validate XML Exter

CVE-2018-2437 CRITICAL
9.1 Jul 10

The SAP Internet Graphics Service (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to externally trigger IGS c

CVE-2018-2442 HIGH
8.8 Aug 14

In SAP BusinessObjects Business Intelligence, versions 4.0, 4.1 and 4.2, while viewing a Web Intelligence report from BI

CVE-2018-2395 HIGH
8.8 Feb 14

Under certain conditions a malicious user may retrieve information on SAP Internet Graphic Server (IGS), 7.20, 7.20EXT,

CVE-2018-2438 HIGH
7.5 Jul 10

The SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, has several denial-of-service vulnerabilities t

CVE-2018-2423 HIGH
7.5 May 09

SAP Internet Graphics Server (IGS), 7.20, 7.20EXT, 7.45, 7.49, 7.53, HTTP and RFC listener allows an attacker to prevent

CVE-2018-2422 HIGH
7.5 May 09

SAP Internet Graphics Server (IGS) Portwatcher, 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to prevent legitimat

CVE-2018-2421 HIGH
7.5 May 09

SAP Internet Graphics Server (IGS) Portwatcher, 7.20, 7.20EXT, 7.45, 7.49, 7.53, allows an attacker to prevent legitimat

CVE-2018-2396 MEDIUM
6.5 Feb 14

Under certain conditions a malicious user can prevent legitimate users from accessing the SAP Internet Graphics Server (

CVE-2018-2394 MEDIUM
6.5 Feb 14

Under certain conditions an unauthenticated malicious user can prevent legitimate users from accessing the SAP Internet

CVE-2018-2391 MEDIUM
6.5 Feb 14

Under certain conditions a malicious user can prevent legitimate users from accessing the SAP Internet Graphics Server (

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