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Vulnerability details: VCID-9p7y-56mq-gkav
Vulnerability ID VCID-9p7y-56mq-gkav
Aliases CVE-2018-16890
Summary libcurl versions from 7.36.0 to before 7.64.0 is vulnerable to a heap buffer out-of-bounds read. The function handling incoming NTLM type-2 messages (`lib/vauth/ntlm.c:ntlm_decode_type2_target`) does not validate incoming data correctly and is subject to an integer overflow vulnerability. Using that overflow, a malicious or broken NTLM server could trick libcurl to accept a bad length + offset combination that would lead to a buffer read out-of-bounds.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-125 Out-of-bounds Read
CWE-190 Integer Overflow or Wraparound
System Score Found at
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16890.json
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
epss 0.00885 https://api.first.org/data/v1/epss?cve=CVE-2018-16890
cvssv3.1 Medium https://curl.se/docs/CVE-2018-16890.html
cvssv3 3.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-16890
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-16890
archlinux High https://security.archlinux.org/AVG-873
archlinux High https://security.archlinux.org/AVG-874
archlinux High https://security.archlinux.org/AVG-875
archlinux High https://security.archlinux.org/AVG-876
archlinux High https://security.archlinux.org/AVG-877
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2019:3701
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16890.json
https://api.first.org/data/v1/epss?cve=CVE-2018-16890
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16890
https://cert-portal.siemens.com/productcert/pdf/ssa-436177.pdf
https://curl.haxx.se/docs/CVE-2018-16890.html
https://curl.se/docs/CVE-2018-16890.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16890
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3822
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3823
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://security.netapp.com/advisory/ntap-20190315-0001/
https://support.f5.com/csp/article/K03314397?utm_source=f5support&amp%3Butm_medium=RSS
https://www.debian.org/security/2019/dsa-4386
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
http://www.securityfocus.com/bid/106947
1670252 https://bugzilla.redhat.com/show_bug.cgi?id=1670252
ASA-201902-10 https://security.archlinux.org/ASA-201902-10
ASA-201902-11 https://security.archlinux.org/ASA-201902-11
ASA-201902-12 https://security.archlinux.org/ASA-201902-12
ASA-201902-13 https://security.archlinux.org/ASA-201902-13
ASA-201902-9 https://security.archlinux.org/ASA-201902-9
AVG-873 https://security.archlinux.org/AVG-873
AVG-874 https://security.archlinux.org/AVG-874
AVG-875 https://security.archlinux.org/AVG-875
AVG-876 https://security.archlinux.org/AVG-876
AVG-877 https://security.archlinux.org/AVG-877
cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:f5:big-ip_access_policy_manager:*:*:*:*:*:*:*:*
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:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_operations_monitor:3.4:*:*:*:*:*:*:*
cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:communications_operations_monitor:4.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:oracle:secure_global_desktop:5.4:*:*:*:*:*:*:*
cpe:2.3:a:siemens:sinema_remote_connect_client:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:siemens:sinema_remote_connect_client:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:netapp:clustered_data_ontap:*:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
CVE-2018-16890 https://nvd.nist.gov/vuln/detail/CVE-2018-16890
USN-3882-1 https://usn.ubuntu.com/3882-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16890.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: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
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:L/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-16890
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-16890
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 0.74486
EPSS Score 0.00885
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:37:33.936243+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/3882-1/ 37.0.0