Vulnerability DatabaseCVE-2021-22945
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CVE-2021-22945
September 23, 2021
When sending data to an MQTT server, libcurl <= 7.73.0 and 7.78.0 could in some circumstances erroneously keep a pointer to an already freed memory area and both use that again in a subsequent call to send data and also free it again.
Affected Packages
libcurl (CONAN):
Affected version(s) >=7.76.0 <7.79.1
Fix Suggestion:
Update to version 7.79.1
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (16)
https://security.alpinelinux.org/vuln/CVE-2021-22945
https://support.apple.com/kb/HT213183
https://github.com/curl/curl/commit/43157490a5054bd
https://security-tracker.debian.org/tracker/CVE-2021-22945
https://security.gentoo.org/glsa/202212-01
https://www.oracle.com/security-alerts/cpuoct2021.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://security.netapp.com/advisory/ntap-20211029-0003/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
https://hackerone.com/reports/1269242
http://seclists.org/fulldisclosure/2022/Mar/29
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://www.debian.org/security/2022/dsa-5197
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-22945
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CVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
CVSS v2
Base Score:
5.8
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
Weakness Type (CWE)
Double Free
CWE-415
EPSS
Base Score:
0.35