Description
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*.
References (10)
Core 10
Core References
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/
Mailing List, Third Party Advisory mailing-list
http://seclists.org/fulldisclosure/2022/Mar/29
Third Party Advisory vendor-advisory
https://www.debian.org/security/2022/dsa-5197
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202212-01
Patch, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
Exploit, Patch, Third Party Advisory
https://hackerone.com/reports/1269242
Third Party Advisory
https://security.netapp.com/advisory/ntap-20211029-0003/
Third Party Advisory
https://support.apple.com/kb/HT213183
Patch, Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html
Scores
CVSS v3
9.1
EPSS
0.0035
EPSS Percentile
57.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-415
Status
published
Products (19)
apple/macos
12.0.0 - 12.3
debian/debian_linux
11.0
fedoraproject/fedora
33
fedoraproject/fedora
35
haxx/libcurl
7.73.0 - 7.78.0
netapp/cloud_backup
netapp/clustered_data_ontap
netapp/h300e_firmware
netapp/h300s_firmware
netapp/h410s_firmware
... and 9 more
Published
Sep 23, 2021
Tracked Since
Feb 18, 2026