Cyber Resilience

CVE-2023-38127

Memory Safety in Justsystems Easy Postcard Max

Public PoCMemory Safety
Published
19 October 2023
Modified
04 November 2025
CVSS Score v3.1 7.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0065 48th percentile
Risk Priority 58 floored blend · peak EPSS

Summary

CVE-2023-38127 is a high-severity Integer Overflow or Wraparound (CWE-190) vulnerability in Justsystems Easy Postcard Max. Its CVSS base score is 7.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 48th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability Data

An integer overflow exists in the "HyperLinkFrame" stream parser of Ichitaro 2023 1.0.1.59372. A specially crafted document can cause the parser to make an under-sized allocation, which can later allow for memory corruption, potentially resulting in arbitrary code execution. An…

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attacker can provide a malicious file to trigger this vulnerability.

CWE(s)
CWE-190

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
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.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1210 Exploitation of Remote Services Lateral Movement
Adversaries may exploit remote services to gain unauthorized access to internal systems once inside of a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-34366Same product: Justsystems Easy Postcard Max
CVE-2023-38128Same product: Justsystems Easy Postcard Max
CVE-2023-35126Same product: Justsystems Easy Postcard Max
CVE-2023-22660Same product: Justsystems Ichitaro 2022
CVE-2023-22291Same product: Justsystems Ichitaro 2022
CVE-2024-49994Shared CWE-190
CVE-2026-37540Shared CWE-190
CVE-2026-24210Shared CWE-190
CVE-2026-53482Shared CWE-190
CVE-2024-26817Shared CWE-190

Affected Assets

justsystems
easy postcard max
all versions
justsystems
ichitaro 2021
all versions
justsystems
ichitaro 2022
all versions
justsystems
ichitaro 2023
1.0.1.59372
justsystems
ichitaro government 10
all versions
justsystems
ichitaro government 8
all versions
justsystems
ichitaro government 9
all versions
justsystems
ichitaro pro 3
all versions
justsystems
ichitaro pro 4
all versions
justsystems
ichitaro pro 5
all versions
+9 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)
  • V5.2.6

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 SDLC practices directly require use of safe arithmetic, bounds checks, and testing that prevent integer overflows.

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.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing in development can detect integer overflows before release.

A.8.25 Secure development life cycle partial match
prevents

Secure SDLC mandates input validation and arithmetic checks that prevent integer overflows.

A.8.26 Application security requirements partial match
degrades

Application security requirements include bounds checking and safe arithmetic to avoid overflow conditions.

A.8.27 Secure system architecture and engineering principles partial match
degrades

Secure architecture principles require defensive coding patterns that mitigate integer wraparound risks.

A.8.28 Secure coding partial match
prevents

Secure coding standards explicitly forbid unsafe integer operations and mandate overflow-safe constructs.

References