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Vulnerability details: VCID-d75n-q9b7-aaah
Vulnerability ID VCID-d75n-q9b7-aaah
Aliases CVE-2016-5420
Summary curl and libcurl before 7.50.1 do not check the client certificate when choosing the TLS connection to reuse, which might allow remote attackers to hijack the authentication of the connection by leveraging a previously created connection with a different client certificate.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-285 Improper Authorization
CWE-295 Improper Certificate Validation
CWE-305 Authentication Bypass by Primary Weakness
System Score Found at
generic_textual Medium http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-5420.html
rhas Moderate https://access.redhat.com/errata/RHSA-2016:2575
rhas Important https://access.redhat.com/errata/RHSA-2016:2957
cvssv3.1 9.8 https://access.redhat.com/errata/RHSA-2018:3558
generic_textual CRITICAL https://access.redhat.com/errata/RHSA-2018:3558
cvssv3 4.2 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5420.json
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.00497 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
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epss 0.01164 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01369 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01369 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
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epss 0.01369 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
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epss 0.01369 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01388 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01388 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01388 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.01388 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.02459 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.02459 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
epss 0.02459 https://api.first.org/data/v1/epss?cve=CVE-2016-5420
rhbs low https://bugzilla.redhat.com/show_bug.cgi?id=1362190
generic_textual Medium https://curl.haxx.se/docs/adv_20160803B.html
cvssv3.1 Medium https://curl.se/docs/CVE-2016-5420.html
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5419
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5420
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5421
cvssv2 4.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2016-5420
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2016-5420
generic_textual Medium https://source.android.com/security/bulletin/2016-12-01.html
generic_textual Medium https://ubuntu.com/security/notices/USN-3048-1
cvssv3.1 6.1 https://www.tenable.com/security/tns-2016-18
generic_textual HIGH https://www.tenable.com/security/tns-2016-18
generic_textual Medium http://www.openwall.com/lists/oss-security/2016/09/05/1
cvssv3.1 5.9 http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
generic_textual MODERATE http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
Reference id Reference type URL
http://lists.opensuse.org/opensuse-updates/2016-09/msg00011.html
http://lists.opensuse.org/opensuse-updates/2016-09/msg00094.html
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-5420.html
http://rhn.redhat.com/errata/RHSA-2016-2575.html
http://rhn.redhat.com/errata/RHSA-2016-2957.html
https://access.redhat.com/errata/RHSA-2018:3558
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5420.json
https://api.first.org/data/v1/epss?cve=CVE-2016-5420
https://curl.haxx.se/docs/adv_20160803B.html
https://curl.se/docs/CVE-2016-5420.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5419
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5420
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-5421
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GLPXQQKURBQFM4XM6645VRPTOE2AWG33/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K3GQH4V3XAQ5Z53AMQRDEC3C3UHTW7QR/
https://security.gentoo.org/glsa/201701-47
https://source.android.com/security/bulletin/2016-12-01.html
https://ubuntu.com/security/notices/USN-3048-1
https://www.tenable.com/security/tns-2016-18
http://www.debian.org/security/2016/dsa-3638
http://www.openwall.com/lists/oss-security/2016/09/05/1
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/92309
http://www.securitytracker.com/id/1036537
http://www.securitytracker.com/id/1036739
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.563059
http://www.ubuntu.com/usn/USN-3048-1
1362190 https://bugzilla.redhat.com/show_bug.cgi?id=1362190
cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
CVE-2016-5420 https://nvd.nist.gov/vuln/detail/CVE-2016-5420
RHSA-2016:2575 https://access.redhat.com/errata/RHSA-2016:2575
RHSA-2016:2957 https://access.redhat.com/errata/RHSA-2016:2957
USN-3048-1 https://usn.ubuntu.com/3048-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/errata/RHSA-2018:3558
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-5420.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-5420
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-5420
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Found at https://www.tenable.com/security/tns-2016-18
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.76739
EPSS Score 0.00497
Published At Nov. 1, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.