Cyber Resilience

CVE-2016-3718

SSRF in Redhat Enterprise Linux Eus 6.7 … 7.7

CISA KEVActive ExploitationEUVD ExploitedPublic PoCSSRF
Published
05 May 2016
Modified
22 April 2026
KEV Added
03 November 2021
Patch / advisory
CVSS Score v3.1 5.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS Score 0.77 99.5th percentile
Risk Priority 75 floored blend · peak EPSS

Summary

CVE-2016-3718 is a medium-severity SSRF (CWE-918) vulnerability in Redhat Enterprise Linux Eus. Its CVSS base score is 5.5 (Medium).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 0.5% of CVEs by exploit likelihood; CISA has added it to the Known Exploited Vulnerabilities catalog; a public proof-of-concept is referenced.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

The vulnerability is an instance of server-side request forgery (SSRF), tracked as CWE-918, that affects the HTTP and FTP coders in ImageMagick versions prior to 6.9.3-10 and 7.x prior to 7.0.1-1. It is triggered when these coders process a specially crafted image file and carries a CVSS 3.1 base score of 5.5.

An attacker can supply the malicious image to any application or workflow that uses the vulnerable ImageMagick library for decoding. Successful exploitation allows the attacker to induce the ImageMagick process to issue arbitrary HTTP or FTP requests to internal or external resources, potentially bypassing network controls or accessing services reachable from the host running ImageMagick.

The referenced ImageMagick changelog and multiple openSUSE security advisories address the issue by releasing updated packages that disable or restrict the HTTP and FTP coders by default and correct the underlying request-handling logic.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

The (1) HTTP and (2) FTP coders in ImageMagick before 6.9.3-10 and 7.x before 7.0.1-1 allow remote attackers to conduct server-side request forgery (SSRF) attacks via a crafted image.

CWE(s)
KEV Date Added
03 November 2021

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2016-3715Same product: Canonical Ubuntu Linuxboth on KEV
CVE-2021-40438Same product: Redhat Enterprise Linux Eusboth on KEV
CVE-2015-2590Same product: Canonical Ubuntu Linuxboth on KEV
CVE-2015-4495Same product: Canonical Ubuntu Linuxboth on KEV
CVE-2021-26855Shared CWE-918both on KEV
CVE-2021-21973Shared CWE-918both on KEV
CVE-2022-41040Shared CWE-918both on KEV
CVE-2026-20230Shared CWE-918both on KEV
CVE-2023-41763Shared CWE-918both on KEV
CVE-2021-22986Shared CWE-918both on KEV

Affected Assets

redhat
enterprise linux desktop
6.0, 7.0
redhat
enterprise linux eus
6.7, 7.2, 7.3, 7.4, 7.5
redhat
enterprise linux for ibm z systems
6.0_s390x, 7.0_s390x
redhat
enterprise linux for ibm z systems eus
6.7_s390x, 7.2_s390x, 7.3_s390x, 7.4_s390x, 7.5_s390x
redhat
enterprise linux for power big endian
6.0_ppc64, 7.0_ppc64
redhat
enterprise linux for power big endian eus
6.7_ppc64, 7.2_ppc64, 7.3_ppc64, 7.4_ppc64, 7.5_ppc64
redhat
enterprise linux for power little endian
7.0_ppc64le
redhat
enterprise linux for power little endian eus
7.2_ppc64le, 7.3_ppc64le, 7.4_ppc64le, 7.5_ppc64le, 7.6_ppc64le
redhat
enterprise linux hpc node
6.0, 7.0
redhat
enterprise linux hpc node eus
7.2
+20 more product configuration(s) — see NVD for full list

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V1.3.6
  • V1.5.3
  • V5.3.2
  • V10.4.7

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

addresses: CWE-918

Penetration testing attempts server-side requests to internal resources, identifying SSRF weaknesses for remediation.

addresses: CWE-918

Outbound connections to external resources can be monitored and limited at the boundary, reducing SSRF impact.

addresses: CWE-918

Validates server-side URLs and resource references to block SSRF attempts.

addresses: CWE-918

Detects server-side request forgery through monitoring of unexpected outbound connections.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure development practices directly include input validation and destination allow-listing that prevent SSRF.

DE.CM-09 partial match
prevents

Runtime monitoring of web applications and services can detect anomalous outbound requests indicative of SSRF.

ID.RA-01 partial match
prevents

Vulnerability identification processes can discover and record SSRF flaws in web applications.

PR.IR-01 partial match
prevents

Network segmentation and egress controls can limit the damage from successful SSRF requests.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

prevents

Operational threat data describing SSRF campaigns can be used to tighten outbound-request allow-lists and detection rules before attackers exploit them.

References