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Vulnerability details: VCID-us64-n1gm-aaas
Vulnerability ID VCID-us64-n1gm-aaas
Aliases CVE-2018-20679
Summary An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.
Status Published
Exploitability 0.5
Weighted Severity 6.8
Risk 3.4
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-125 Out-of-bounds Read
System Score Found at
cvssv3.1 7.5 http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
ssvc Track http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-20679.html
cvssv3 4.3 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20679.json
epss 0.00318 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00318 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00318 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00318 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.00568 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.04422 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.04422 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.04422 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.04422 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.04422 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05124 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05124 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05124 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.05258 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.07094 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.0987 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
epss 0.27086 https://api.first.org/data/v1/epss?cve=CVE-2018-20679
cvssv3.1 7.5 https://bugs.busybox.net/show_bug.cgi?id=11506
ssvc Track https://bugs.busybox.net/show_bug.cgi?id=11506
rhbs low https://bugzilla.redhat.com/show_bug.cgi?id=1666667
cvssv3.1 7.5 https://busybox.net/news.html
generic_textual Low https://busybox.net/news.html
ssvc Track https://busybox.net/news.html
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20679
cvssv3.1 7.5 http://seclists.org/fulldisclosure/2019/Sep/7
ssvc Track http://seclists.org/fulldisclosure/2019/Sep/7
cvssv3 5.3 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1 7.5 https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
ssvc Track https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-20679
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-20679
cvssv3.1 7.5 https://seclists.org/bugtraq/2019/Sep/7
ssvc Track https://seclists.org/bugtraq/2019/Sep/7
generic_textual Low https://ubuntu.com/security/notices/USN-3935-1
cvssv3.1 7.5 https://usn.ubuntu.com/3935-1/
ssvc Track https://usn.ubuntu.com/3935-1/
generic_textual Low https://usn.ubuntu.com/usn/usn-3935-1
Reference id Reference type URL
http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-20679.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20679.json
https://api.first.org/data/v1/epss?cve=CVE-2018-20679
https://bugs.busybox.net/show_bug.cgi?id=11506
https://busybox.net/news.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20679
http://seclists.org/fulldisclosure/2019/Sep/7
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
https://seclists.org/bugtraq/2019/Sep/7
https://ubuntu.com/security/notices/USN-3935-1
https://usn.ubuntu.com/3935-1/
https://usn.ubuntu.com/usn/usn-3935-1
1666667 https://bugzilla.redhat.com/show_bug.cgi?id=1666667
918846 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=918846
cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
CVE-2018-20679 https://nvd.nist.gov/vuln/detail/CVE-2018-20679
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.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
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-20679.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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://bugs.busybox.net/show_bug.cgi?id=11506
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at https://bugs.busybox.net/show_bug.cgi?id=11506
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://busybox.net/news.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
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at https://busybox.net/news.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at http://seclists.org/fulldisclosure/2019/Sep/7
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at http://seclists.org/fulldisclosure/2019/Sep/7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-20679
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:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-20679
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://seclists.org/bugtraq/2019/Sep/7
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at https://seclists.org/bugtraq/2019/Sep/7
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://usn.ubuntu.com/3935-1/
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-06-09T15:25:21Z/ Found at https://usn.ubuntu.com/3935-1/
Exploit Prediction Scoring System (EPSS)
Percentile 0.70076
EPSS Score 0.00318
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.