CVE-2023-33953

highPriorität · verfolgen · 30EPSS 0.005 · 41. PerzentilDEEUNLUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.48% (41st) EPSS
CVSS 7.5 · high
Is it mine?
52 products
Prüfe deine Angriffsfläche
Who says so?
10 sources
cnnvd · enisa_euvd · osv · cert_bund

EPSS · bewertet 2026-10-27

gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks: - Unbounded memory buffering in the HPACK parser - Unbounded CPU consumption in the HPACK parser The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client. The unbounded memory buffering bugs: - The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb. - HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse. - gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…

01

Behebungen

Hersteller-Fix, Mitigation oder Workaround, wie von den Quellen veröffentlicht.

Ein Hersteller-Fix ist verfügbar.

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  • Behobenphoenix_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.

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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).

  • BehobenSIMATIC 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

02

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

7.5
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USAusnutzbarkeit 3.9 · Auswirkung 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
v3.17.5highCVSS: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:Hsecondary · cve-coordination@google.comAusnutzbarkeit 3.9 · Auswirkung 3.6
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · OSV
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
v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · SUSE Product Security
v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · NCSC-NL NL
03

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS
04

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-770USprimärCWE-834USprimärCWE-770USCWE-789USCWE-789USCWE-834USCWE-834USCWE-834USCWE-834US
05

betroffene Produkte (52)

Betroffene Produkte und Versionsbereiche.

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06

Advisories (8)

Hersteller- und Ökosystem-Meldungen dazu.

  • NCSC-2025-0028Kwetsbaarheden verholpen in Oracle AnalyticsNL2025-01-22csaf · ncsc_nlNL

    Oracle heeft kwetsbaarheden verholpen in Oracle Analytics producten, zoals Business Intelligence, Analytics Desktop en BI Publisher.

  • 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.

  • SUSE-SU-2026:0840-1Security update for grpc2026-03-06csaf · suse_csafDE

    Security update for grpc

  • 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-2024-1591Juniper JUNOS: Mehrere SchwachstellenDeutsch2024-07-10csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Juniper JUNOS ausnutzen, um einen Denial of Service zu verursachen, Informationen offenzulegen, Privilegien zu erweitern und Sicherheitsmechanismen inklusive zu umgehen.

  • GHSA-496j-2rq6-j6ccExcessive Iteration in gRPC2023-08-09ghsa · osvUS

    gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks: - Unbounded memory buffering in the HPACK parser - Unbounded CPU consumption in the HPACK parser The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client. The unbounded memory buffering bugs: - The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb. - HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse. - gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…

  • 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.

  • PYSEC-2026-1424Excessive Iteration in gRPC2026-07-07vendor · osvUS

    gRPC contains a vulnerability that allows hpack table accounting errors could lead to unwanted disconnects between clients and servers in exceptional cases/ Three vectors were found that allow the following DOS attacks: - Unbounded memory buffering in the HPACK parser - Unbounded CPU consumption in the HPACK parser The unbounded CPU consumption is down to a copy that occurred per-input-block in the parser, and because that could be unbounded due to the memory copy bug we end up with an O(n^2) parsing loop, with n selected by the client. The unbounded memory buffering bugs: - The header size limit check was behind the string reading code, so we needed to first buffer up to a 4 gigabyte string before rejecting it as longer than 8 or 16kb. - HPACK varints have an encoding quirk whereby an infinite number of 0’s can be added at the start of an integer. gRPC’s hpack parser needed to read all of them before concluding a parse. - gRPC’s metadata overflow check was performed per frame, so that the following sequence of frames could cause infinite buffering: HEADERS: containing a: 1 CONTINUATION: containing a: 2 CONTINUATION: containing a: 3 etc…

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cnnvdenisa_euvdosvcert_bundcisa_csaf_otncsc_nlnvdsiemens_psirtsuse_csafphoenix_contact_psirtNVDCVE.orgMITRE
veröffentlicht 2023-08-09geändert 2026-06-17
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Referenzen (7)

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