Home/CVE/libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches
CVE

CVE-2021-22924

libcurl keeps previously used connections in a connection pool for subsequenttransfers to reuse, if one of them matches

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.

LOW · CVSS 3.7 EPSS 0.0056
Schedule remediation
  • Public exploit or PoC is available
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-20Improper Input Validation
CWE-706Use of Incorrectly-Resolved Name or Reference
▤

Affected Products & Versions

36
haxx libcurl>= 7.10.4 and < 7.77.0
fedoraproject fedoraall versions
debian linuxall versions
netapp cloud backupall versions
netapp clustered data ontapall versions
netapp solidfire \& hci management nodeall versions
netapp solidfire baseboard management controller firmwareall versions
oracle mysql server>= 5.7.0 and <= 5.7.36
⚠

Public Exploits & PoCs

1
pochackerone.com · 1223565hackerone.com
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPotential DLL Sideloading Of Libcurl.DLL Via GUP.EXE
▣

Scoring & Timeline

3.7
LOW · CVSS v3.1 · support@hackerone.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD05 Aug 2021 · 09:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

21
suse-csafopenSUSE-SU-2024:10582-1
siemens-csafSSA-398330
siemens-csafSSA-484086
siemens-csafSSA-732250
siemens-csafSSA-389290
🔗

References & Sources

14
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatchThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdfThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-732250.pdfThird Party Advisory
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cdev.kafka.apache.org%3EMailing ListThird Party Advisory
https://lists.apache.org/thread.html/r61db8e7dcb56dc000a5387a88f7a473bacec5ee01b9ff3f55308aacc%40%3Cusers.kafka.apache.org%3EMailing ListThird Party Advisory
https://lists.apache.org/thread.html/rbf4ce74b0d1fa9810dec50ba3ace0caeea677af7c27a97111c06ccb7%40%3Cdev.kafka.apache.org%3EMailing ListThird Party Advisory
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