CVE-2023-27537

A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
hackeroneCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 11%
VendorProductVersion
haxxlibcurl
7.88.0
haxxlibcurl
7.88.1
netappactive_iq_unified_manager
-
netappclustered_data_ontap
9.0
broadcombrocade_fabric_operating_system_firmware
-
netapph300s_firmware
-
netapph500s_firmware
-
netapph700s_firmware
-
netapph410s_firmware
-
splunkuniversal_forwarder
8.2.0 ≤
𝑥
< 8.2.12
splunkuniversal_forwarder
9.0.0 ≤
𝑥
< 9.0.6
splunkuniversal_forwarder
9.1.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
curl
bullseye
7.74.0-1.3+deb11u13
not-affected
buster
not-affected
bullseye (security)
7.74.0-1.3+deb11u14
fixed
bookworm
7.88.1-10+deb12u8
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
sid
8.11.1-1
fixed
trixie
8.11.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
lunar
Fixed 7.88.1-6ubuntu2
released
kinetic
not-affected
jammy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected