CVE-2023-38039

highpriority · attend · 60EPSS 0.564 · 99 %ileexploit · PoCDEEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

56.4% (99th) EPSS

CVSS 7.5 · high

Is it mine?

86 products

Check your exposure

Who says so?

8 sources

cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · scored 2026-10-26

When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedSIMATIC RTLS Locating Manager (6GT2780-0DA00)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA10)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA20)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA30)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA10)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA20)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA30)siemens_psirt
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSINEC NMSsiemens_psirt
Update to V2.0 SP1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109826954/
Fixedphoenix_contact_psirt
Update to the latest 2024.0.6 LTS Firmware Release. PHOENIX CONTACT recommends to always use an up-to-date version of the PLCnext Engineer.
FixedSINEC NMScisa_csaf_ot
Update to V2.0 SP1 or later version
https://support.industry.siemens.com/cs/ww/en/view/109826954/
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA00)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA10)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA20)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-0DA30)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA10)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA20)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
FixedSIMATIC RTLS Locating Manager (6GT2780-1EA30)cisa_csaf_ot
Update to V3.0.1.1 or later version The update is available from Siemens Online Software Delivery (OSD).
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA00)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA10)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA20)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA30)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA10)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA20)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA30)siemens_psirt
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA00)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA10)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA20)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-0DA30)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA10)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA20)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines
MitigationSIMATIC RTLS Locating Manager (6GT2780-1EA30)cisa_csaf_ot
Apply security hardening of the Windows Server, where the RTLS Locating Manager is installed on, in accordance with your corporate security policies or up-to-date hardening guidelines

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · CISA US

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondaryexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Phoenix Contact PSIRT DE

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-201USCWE-770USCWE-770USCWE-770US

exploits (1)

Public proof-of-concept and weaponised exploit code.

Smartkeyss/CVE-2023-38039For all vicarius.io/vsoviety analysisPoC · poc_in_github

affected products (86)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Dell Data Protection Advisor <19.12all versionscert_bundDE
Dell NetWorker vProxy<19.10all versionscert_bundDE
Dell NetWorker vProxy<19.9.0.4all versionscert_bundDE
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
IBM MQall versionscert_bundDEcpe:/a:ibm:mq:-
IBM Rational ClearCase 10.0.1all versionscert_bundDEcpe:/a:ibm:rational_clearcase:10.0.1
IBM Rational ClearCase 9.1all versionscert_bundDEcpe:/a:ibm:rational_clearcase:9.1
Meinberg LANTIME <7.08.004all versionscert_bundDE
NetApp Data ONTAP 9all versionscert_bundDEcpe:/a:netapp:data_ontap:9
Open Source cURL <8.3.0all versionscert_bundDE
Red Hat JBoss Core Servicesall versionscert_bundDEcpe:/a:redhat:jboss_core_services:-
Red Hat JBoss Core Services 1all versionscert_bundDEcpe:/a:redhat:jboss_core_services:1.0
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Ubuntu Linuxall versionscert_bundDEcpe:/o:canonical:ubuntu_linux:-
Xerox FreeFlow Print Server v7all versionscert_bundDEcpe:/a:xerox:freeflow_print_server:v7
Xerox FreeFlow Print Server v9all versionscert_bundDEcpe:/a:xerox:freeflow_print_server:v9
Dell Data Protection Advisor< 19.12cert_bundDE
Dell Networker≤ vProxy<19.10cert_bundDE

showing 20 of 86

advisories (10)

Vendor and ecosystem advisories describing this.

SSA-093430SSA-093430: Multiple Vulnerabilities in SIMATIC RTLS Locating Manager before V3.02024-05-14csaf · siemens_psirtDE
Siemens has released a new version for SIMATIC RTLS Locating Manager and recommends to update to the latest version.
SSA-943925SSA-943925: Multiple Vulnerabilities in SINEC NMS before V2.0 SP12024-02-13csaf · siemens_psirtDE
SINEC NMS before V2.0 SP1 is affected by multiple vulnerabilities. Siemens has released an update for SINEC NMS and recommends to update to the latest version.
VDE-2024-073Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware2024-12-09csaf · phoenix_contact_psirtDE
Multiple Linux component vulnerabilities fixed in latest PLCnext Firmware release 2024.0.6 LTS
WID-SEC-W-2023-2335cURL: Schwachstelle ermöglicht Denial of ServiceDeutsch2023-09-12csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann eine Schwachstelle in cURL ausnutzen, um einen Denial of Service Angriff durchzuführen.
WID-SEC-W-2023-2673Oracle Database Server: Mehrere SchwachstellenDeutsch2023-10-17csaf · cert_bundDE
Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in Oracle Database Server ausnutzen, um die Vertraulichkeit, Integrität und Verfügbarkeit zu gefährden.
WID-SEC-W-2024-0175Apple macOS: Mehrere SchwachstellenDeutsch2024-01-22csaf · cert_bundDE
Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in Apple macOS ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen oder vertrauliche Informationen offenzulegen.
WID-SEC-W-2024-0178Apple iOS und iPadOS: Mehrere SchwachstellenDeutsch2024-01-22csaf · cert_bundDE
Ein entfernter anonymer Angreifer kann mehrere Schwachstellen in Apple iOS und Apple iPadOS ausnutzen, um beliebigen Code auszuführen oder vertrauliche Informationen offenzulegen.
ICSA-24-046-15Siemens SINEC NMS2024-02-13icsa · cisa_csaf_otUS
SINEC NMS before V2.0 SP1 is affected by multiple vulnerabilities. Siemens has released an update for SINEC NMS and recommends to update to the latest version.
ICSA-24-137-07Siemens SIMATIC RTLS Locating Manager2024-05-14icsa · cisa_csaf_otUS
Siemens has released a new version for SIMATIC RTLS Locating Manager and recommends to update to the latest version.
CURL-CVE-2023-38039HTTP headers eat all memory2023-09-13vendor · osvUS
When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit on the size or quantity of headers it would accept in a response, allowing a malicious server to stream an endless series of headers to a client and eventually cause curl to run out of heap memory.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cert_bund siemens_psirt phoenix_contact_psirt cisa_csaf_ot osv NVD CVE.org MITRE

published 2023-09-15modified 2026-06-17

related (3,256)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2025-53521US	—OT critical	2.30% (83rd)	KEV	2025-10-15
When a BIG-IP APM access policy is configured on a virtual server, specific malicious traffic can lead to Remote Code Execution (RCE). Note: Software versions which have reached…
CVE-2022-22963US	critical9.8OT critical	99.9% (100th)	KEV	2022-04-01
In Spring Cloud Function versions 3.1.6, 3.2.2 and older unsupported versions, when using routing functionality it is possible for a user to provide a specially crafted SpEL as a r…
CVE-2020-3569US	high8.6OT critical	3.32% (89th)	KEV	2020-09-23
Multiple vulnerabilities in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to either immedi…
CVE-2020-3566US	high8.6OT critical	3.70% (90th)	KEV	2020-08-29
A vulnerability in the Distance Vector Multicast Routing Protocol (DVMRP) feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to exhaust process memory…
CVE-2023-50387US	high7.5	100.0% (100th)	Exploit	2024-02-14
Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more D…

+3251 more

references (47)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan