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CVE-2021-22945

Good to know:

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Date: 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*.

Language: C

Severity Score

Related Resources (18)

https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
https://security.netapp.com/advisory/ntap-20211029-0003/
https://hackerone.com/reports/1269242
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
http://seclists.org/fulldisclosure/2022/Mar/29
https://github.com/curl/curl/commit/43157490a5054bd
https://security-tracker.debian.org/tracker/CVE-2021-22945
https://nvd.nist.gov/vuln/detail/CVE-2021-22945
https://security.alpinelinux.org/vuln/CVE-2021-22945
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-22945
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://support.apple.com/kb/HT213183
https://security.gentoo.org/glsa/202212-01
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
https://www.debian.org/security/2022/dsa-5197
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.mend.io/vulnerability-database/CVE-2021-22945

Severity Score

Weakness Type (CWE)

Double Free

CWE-415

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): PARTIAL
Additional information:

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