CVE-2021-22924

mediumPriorität · verfolgen · 27EPSS 0.063 · 94. PerzentilExploit · PoCDEEUFRRUUS
grimoire priorityP1 · Urgent
Exploitable?
Public exploit
1 exploit · PoC
Likely / severe?
6.27% (94th) EPSS
CVSS 4.3 · medium
Is it mine?
91 products
Prüfe deine Angriffsfläche
Who says so?
8 sources
cnnvd · enisa_euvd · fstec_bdu · cert_bund

EPSS · bewertet 2026-10-27

libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches the setup.Due to errors in the logic, the config matching function did not take 'issuercert' into account and it compared the involved paths *case insensitively*,which could lead to libcurl reusing wrong connections.File paths are, or can be, case sensitive on many systems but not all, and caneven vary depending on used file systems.The comparison also didn't include the 'issuer cert' which a transfer can setto qualify how to verify the server certificate.

01

Behebungen

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

Ein Hersteller-Fix ist verfügbar.

02

cvss

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

4.3
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · low–medium · 3.5–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USAusnutzbarkeit 8.6 · Auswirkung 2.9
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nprimary · NVD / NIST USAusnutzbarkeit 2.2 · Auswirkung 1.4
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · CISA US
v3.13.7lowAV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:Nsecondary · ENISA EU
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:NsecondaryAusnutzbarkeit 2.2 · Auswirkung 1.4
v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.13.5lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N/E:Psecondary · CVSS-BT (t0sche)
03

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
04

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-706USprimärCWE-20USCWE-706USCWE-706USCWE-706US
05

Exploits (1)

Öffentlicher Proof-of-Concept- und Exploit-Code.

06

betroffene Produkte (91)

Betroffene Produkte und Versionsbereiche.

20 von 91 angezeigt
07

Advisories (15)

Hersteller- und Ökosystem-Meldungen dazu.

  • SSA-389290SSA-389290: Third-Party Component Vulnerabilities in SINEC INS2022-03-08csaf · siemens_psirtDE

    71 vulnerabilities in third-party components as Node.js, cURL, SQLite, CivetWeb and DNS(ISC BIND) could allow an attacker to interfere with the affected product in various ways. Siemens has released an update for SINEC INS and recommends to update to the latest versions.

  • SSA-398330SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.52023-12-12csaf · siemens_psirtDE

    Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 are no longer maintained and there won't be any update to the CVE list anymore. Please update to the latest version. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 (https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

  • SSA-484086SSA-484086: Multiple Vulnerabilities in SINEMA Remote Connect Server before V3.12022-06-14csaf · siemens_psirtDE

    SINEMA Remote Connect Server is affected by multiple vulnerabilities, including - A cross-site scripting vulnerability in an error message pop up window (CVE-2022-29034) - Several authentication bypass, privilege escalation and integrity check vulnerabilities (CVE-2022-32251 through -32261) - A command injection vulnerability in the file upload service (CVE-2022-32262) - A chosen-plaintext attack against HTTP over TLS ("BREACH", CVE-2022-27221) - Information disclosure vulnerabilities in the curl component (CVE-2021-22924 through -22925) - Several vulnerabilities in the libexpat library, that could be exploited when the server is parsing untrusted XML files (CVE-2021-45960, CVE-2021-46143, CVE-2022-22822 through -22827, CVE-2022-23852, CVE-2022-23990, CVE-2022-25235 through -25236, CVE-2022-25313 through -25315. Siemens has released an update for the SINEMA Remote Connect Server and recommends to update to the latest version. Note that the update also contains additional fixes for vulnerabilities documented in Siemens Security Advisories SSA-244969, SSA-539476, SSA-685781 and SSA-712929.

  • SSA-732250SSA-732250: Libcurl Vulnerabilities in Industrial Devices2022-05-10csaf · siemens_psirtDE

    Vulnerabilities in third-party component cURL could allow an attacker to interfere with the affected products in various ways. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends countermeasures for products where updates are not, or not yet available.

  • WID-SEC-W-2022-0874cURL: Mehrere SchwachstellenDeutsch2021-07-20csaf · cert_bundDE

    Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um Dateien zu manipulieren oder Informationen offenzulegen.

  • WID-SEC-W-2023-1350Splunk Splunk Enterprise: Mehrere Schwachstellen in Komponenten von DrittanbieternDeutsch2023-06-01csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise in diversen Komponenten von Drittanbietern ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

  • WID-SEC-W-2023-2229Splunk Splunk Enterprise: Mehrere SchwachstellenDeutsch2023-08-30csaf · cert_bundDE

    Ein entfernter, authentifizierter Angreifer kann mehrere Schwachstellen in Splunk Splunk Enterprise ausnutzen, um beliebigen Code auszuführen, einen 'Denial of Service'-Zustand zu verursachen, seine Privilegien zu erweitern und weitere, nicht spezifizierte Auswirkungen zu verursachen.

  • WID-SEC-W-2024-0556Sophos Unified Threat Management (UTM) Software: Mehrere SchwachstellenDeutsch2024-03-05csaf · cert_bundDE

    Ein anonymer Angreifer kann mehrere Schwachstellen in der Sophos Unified Threat Management (UTM)-Software ausnutzen, um vertrauliche Informationen offenzulegen, einen Denial of Service zu verursachen Dateien zu manipulieren oder weitere, unbekannte Auswirkungen zu verursachen.

  • WID-SEC-W-2026-0180Dell Data Protection Advisor: Mehrere SchwachstellenDeutsch2026-01-20csaf · cert_bundDE

    Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen und nicht näher spezifizierte Angriffe zu starten.

  • ICSA-22-069-09Siemens SINEC INS2022-03-08icsa · cisa_csaf_otUS

    71 vulnerabilities in third-party components as Node.js, cURL, SQLite, CivetWeb and DNS(ISC BIND) could allow an attacker to interfere with the affected product in various ways. Siemens has released an update for SINEC INS and recommends to update to the latest versions.

  • ICSA-22-132-13Siemens Industrial Devices using libcurl2022-05-10icsa · cisa_csaf_otUS

    Vulnerabilities in third-party component cURL could allow an attacker to interfere with the affected products in various ways. Siemens has released updates for several affected products and recommends to update to the latest versions. Siemens recommends countermeasures for products where updates are not, or not yet available.

  • ICSA-22-167-17Siemens OpenSSL Affecting Industrial Products2022-06-14icsa · cisa_csaf_otUS

    SINEMA Remote Connect Server is affected by multiple vulnerabilities, including - A cross-site scripting vulnerability in an error message pop up window (CVE-2022-29034) - Several authentication bypass, privilege escalation and integrity check vulnerabilities (CVE-2022-32251 through -32261) - A command injection vulnerability in the file upload service (CVE-2022-32262) - A chosen-plaintext attack against HTTP over TLS ("BREACH", CVE-2022-27221) - Information disclosure vulnerabilities in the curl component (CVE-2021-22924 through -22925) - Several vulnerabilities in the libexpat library, that could be exploited when the server is parsing untrusted XML files (CVE-2021-45960, CVE-2021-46143, CVE-2022-22822 through -22827, CVE-2022-23852, CVE-2022-23990, CVE-2022-25235 through -25236, CVE-2022-25313 through -25315. Siemens has released an update for the SINEMA Remote Connect Server and recommends to update to the latest version. Note that the update also contains additional fixes for vulnerabilities documented in Siemens Security Advisories SSA-244969, SSA-539476, SSA-685781 and SSA-712929.

  • ICSA-23-348-10Siemens SIMATIC S7-15002023-12-12icsa · cisa_csaf_otUS

    Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version >= V3.1.0 and < V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant). These GNU/Linux vulnerabilities have been externally identified. Siemens has released new versions for the affected products and recommends to update to the latest versions. Note: This SSA advises vulnerabilities for firmware version V3.1 only; for versions < V3.1 refer to Siemens Security Bulletin SSB-439005 ( https://cert-portal.siemens.com/productcert/html/ssb-439005.html).

  • CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR
  • CURL-CVE-2021-22924Bad connection reuse due to flawed path name checks2021-07-21vendor · osvUS

    libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse, if one of them matches the setup. Due to errors in the logic, the config matching function did not take 'issuer cert' into account and it compared the involved paths *case insensitively*, which could lead to libcurl reusing wrong connections. File paths are, or can be, case sensitive on many systems but not all, and can even vary depending on used file systems. The comparison also did not include the 'issuer cert' which a transfer can set to qualify how to verify the server certificate.

08

auch bekannt als (4)

Weitere Namen und Kennungen dieser Entität.

09

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdfstec_bducert_bundcisa_csaf_otsiemens_psirtcertfrosvNVDCVE.orgMITRE
veröffentlicht 2021-08-05geändert 2026-06-17
11

Referenzen (90)

Externe Belege — Patches, Meldungen, Analysen.

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