CVE-2023-27536

An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse previously established connections with incorrect user permissions due to a failure to check for changes in the CURLOPT_GSSAPI_DELEGATION option. This vulnerability affects krb5/kerberos/negotiate/GSSAPI transfers and could potentially result in unauthorized access to sensitive information. The safest option is to not reuse connections if the CURLOPT_GSSAPI_DELEGATION option has been changed.
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:H/I:N/A:N
hackeroneCNA
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CVEADP
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CISA-ADPADP
5.9 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
VendorProductVersion
haxxlibcurl
7.22.0 ≤
𝑥
≤ 7.88.1
debiandebian_linux
10.0
netappactive_iq_unified_manager
-
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
fixed
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
Fixed 7.85.0-1ubuntu0.5
released
jammy
Fixed 7.81.0-1ubuntu1.10
released
focal
Fixed 7.68.0-1ubuntu2.18
released
bionic
Fixed 7.58.0-2ubuntu3.24
released
xenial
Fixed 7.47.0-1ubuntu2.19+esm8
released
trusty
Fixed 7.35.0-1ubuntu2.20+esm15
released