Cyber Resilience

CVE-2023-27537

Memory Safety in Splunk Universal Forwarder 8.2.0 – 8.2.12

Public PoCMemory Safety
Published
30 March 2023
Modified
21 November 2024
CVSS Score v3.1 5.9
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.019 77th percentile
Risk Priority 35 floored blend · peak EPSS

Summary

CVE-2023-27537 is a medium-severity Double Free (CWE-415) vulnerability in Splunk Universal Forwarder. Its CVSS base score is 5.9 (Medium).

Operationally, ranked in the top 23% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability Data

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due…

more

to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.

CWE(s)
CWE-415

Related Threats

CVEs Like This One

CVE-2023-27538Same product: Broadcom Brocade Fabric Operating System Firmware
CVE-2023-23915Same product: Netapp Active Iq Unified Manager
CVE-2023-23914Same product: Netapp Active Iq Unified Manager
CVE-2023-27534Same product: Broadcom Brocade Fabric Operating System Firmware
CVE-2023-27533Same product: Netapp Active Iq Unified Manager
CVE-2023-26545Same product: Netapp H300S
CVE-2023-27535Same product: Haxx Libcurl
CVE-2023-27536Same product: Haxx Libcurl
CVE-2023-23916Same product: Netapp Clustered Data Ontap
CVE-2021-22600Same product: Netapp H300S

Affected Assets

haxx
libcurl
7.88.0, 7.88.1
netapp
active iq unified manager
all versions
netapp
clustered data ontap
9.0
broadcom
brocade fabric operating system firmware
all versions
netapp
h300s firmware
all versions
netapp
h500s firmware
all versions
netapp
h700s firmware
all versions
netapp
h410s firmware
all versions
splunk
universal forwarder
9.1.0 · 8.2.0 — 8.2.12 · 9.0.0 — 9.0.6

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 1 hardening rule · 1 OS baseline
Validate
Prove the fix (OWASP ASVS)

—

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 full match
prevents

Secure SDLC practices directly prevent double-free errors via static analysis, safe memory APIs, and testing.

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
detects

Security testing in development can detect double-free conditions before release.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle includes memory-safety practices that can prevent double-free bugs.

A.8.26 Application security requirements partial match
prevents

Application security requirements can mandate memory-safety rules that reduce double-free risk.

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

Secure system architecture and engineering principles can prescribe safe memory-management patterns.

A.8.28 Secure coding partial match
prevents

Secure coding standards directly address proper use of free() and similar functions.

References