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Vulnerability details: VCID-f78a-6yr3-2kd7
Vulnerability ID VCID-f78a-6yr3-2kd7
Aliases CVE-2018-16839
Summary Curl versions 7.33.0 through 7.61.1 are vulnerable to a buffer overrun in the SASL authentication code that may lead to denial of service.
Status Published
Exploitability 0.5
Weighted Severity 8.8
Risk 4.4
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-131 Incorrect Calculation of Buffer Size
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-190 Integer Overflow or Wraparound
CWE-122 Heap-based Buffer Overflow
System Score Found at
cvssv3 5.0 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16839.json
epss 0.00335 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
epss 0.00342 https://api.first.org/data/v1/epss?cve=CVE-2018-16839
cvssv3.1 Low https://curl.se/docs/CVE-2018-16839.html
cvssv3 4.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-16839
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2018-16839
archlinux High https://security.archlinux.org/AVG-796
archlinux High https://security.archlinux.org/AVG-797
archlinux High https://security.archlinux.org/AVG-798
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16839.json
https://api.first.org/data/v1/epss?cve=CVE-2018-16839
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16839
https://curl.haxx.se/docs/CVE-2018-16839.html
https://curl.se/docs/CVE-2018-16839.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16839
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16842
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/curl/curl/commit/f3a24d7916b9173c69a3e0ee790102993833d6c5
https://lists.apache.org/thread.html/8338a0f605bdbb3a6098bb76f666a95fc2b2f53f37fa1ecc89f1146f%40%3Cdevnull.infra.apache.org%3E
https://lists.debian.org/debian-lts-announce/2018/11/msg00005.html
https://security.gentoo.org/glsa/201903-03
https://www.debian.org/security/2018/dsa-4331
http://www.securitytracker.com/id/1042012
1642201 https://bugzilla.redhat.com/show_bug.cgi?id=1642201
ASA-201811-7 https://security.archlinux.org/ASA-201811-7
ASA-201811-8 https://security.archlinux.org/ASA-201811-8
ASA-201811-9 https://security.archlinux.org/ASA-201811-9
AVG-796 https://security.archlinux.org/AVG-796
AVG-797 https://security.archlinux.org/AVG-797
AVG-798 https://security.archlinux.org/AVG-798
cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*
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: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: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:*:*:*:*:*:*:*
CVE-2018-16839 https://nvd.nist.gov/vuln/detail/CVE-2018-16839
USN-3805-1 https://usn.ubuntu.com/3805-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-16839.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:L/PR:N/UI:R/S:U/C:N/I:N/A:L 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:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-16839
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:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-16839
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 0.55724
EPSS Score 0.00335
Published At Aug. 16, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:30:24.393456+00:00 Alpine Linux Importer Import https://secdb.alpinelinux.org/v3.21/main.json 37.0.0