busybox: Out of bounds read in udhcp components resulting in information disclosure
Published Jan 9, 2019
7.5
HIGHCVSS 3.1
EPSS 4.65%
Description
An issue was discovered in BusyBox through 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP client, server, and/or relay) might allow a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to assurance of a 4-byte length when decoding DHCP_SUBNET. NOTE: this issue exists because of an incomplete fix for CVE-2018-20679.
Affected products
No data.
Configuration 2
- 14.04
- 16.04
- 18.04
- 18.10
No data.
Red Hat Enterprise Linux 5
busybox
Not affected
Red Hat Enterprise Linux 6
busybox
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | busybox | Not affected | n/a |
| Red Hat Enterprise Linux 6 | busybox | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the versions of busybox as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Jun 9, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 4.65% (0.04651) | 91.46th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.65% (0.04651) | 90.53th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.38% (0.00376) | 57.07th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.75% (0.00754) | 81.72th | v3 (v2023.03.01) |
| Jun 1, 2024 | 0.75% (0.00754) | 81.05th | v3 (v2023.03.01) |
| Jan 3, 2024 | 0.85% (0.00846) | 80.31th | v3 (v2023.03.01) |
| Jun 7, 2023 | 0.67% (0.00671) | 76.90th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.70% (0.00705) | 77.28th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.30% (0.12300) | 89.42th | v2 (v2022.01.01) |
| Feb 3, 2022 | 7.69% (0.07689) | 84.25th | v1 |
| Jan 6, 2022 | 7.69% (0.07689) | 84.10th | v1 |
| Sep 1, 2021 | 1.82% (0.01823) | 74.64th | v1 |
| Apr 14, 2021 | 1.82% (0.01823) | 0.00th | v1 |
References (10)
- http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://seclists.org/fulldisclosure/2019/Sep/7 mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-5747 Vendor Advisory
- https://bugs.busybox.net/show_bug.cgi?id=11506 x_refsource_MISCExploitIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1667067 Issue Tracking
- https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-5747
- https://seclists.org/bugtraq/2019/Sep/7 mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory
- https://usn.ubuntu.com/3935-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-5747
| Link | Providers | Tags |
|---|---|---|
| http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| http://seclists.org/fulldisclosure/2019/Sep/7 | mailing-listx_refsource_FULLDISCMailing ListThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2019-5747 | Vendor Advisory | |
| https://bugs.busybox.net/show_bug.cgi?id=11506 | x_refsource_MISCExploitIssue TrackingThird Party Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1667067 | Issue Tracking | |
| https://git.busybox.net/busybox/commit/?id=74d9f1ba37010face4bd1449df4d60dd84450b06 | x_refsource_MISCPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-5747 | ||
| https://seclists.org/bugtraq/2019/Sep/7 | mailing-listx_refsource_BUGTRAQMailing ListThird Party Advisory | |
| https://usn.ubuntu.com/3935-1/ | vendor-advisoryx_refsource_UBUNTUThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-5747 |
Change history (0)
No recorded changes yet.