Description
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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | busybox | 1:1.30.1-1 | — |
| Debian 13 | busybox | 1:1.30.1-1 | — |
| Debian 12 | busybox | 1:1.30.1-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | busybox | 1:1.27.2-2ubuntu3.2 | USN-3935-1 |
| Ubuntu 16.04 LTS | busybox | 1:1.22.0-15ubuntu1.4 | USN-3935-1 |
| Ubuntu 14.04 LTS | busybox | 1:1.21.0-1ubuntu1.4 | USN-3935-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | busybox | 1.35.0-150400.3.3.1 | SUSE-SU-2022:3959-1 |
| SLES 15 SP3 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLES 15 SP2 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLES 15 SP1 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLES 15 | busybox | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
Show 20 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLES 12 SP4 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLES 12 SP3 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLES 12 SP2 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLES for SAP 15 SP2 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SLES for SAP 15 SP1 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLES for SAP 15 | busybox | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLES for SAP 12 SP5 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLES for SAP 12 SP4 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SLE Real Time 15 SP2 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-2 |
| SLE HPC 15 SP2 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SLE HPC 15 SP1 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SLE HPC 15 | busybox | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
| SUSE OpenStack Cloud Crowbar 9 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SUSE OpenStack Cloud 9 | busybox | 1.35.0-4.3.1 | SUSE-SU-2022:4253-1 |
| SUSE Manager Server 4.1 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SUSE Manager Retail Branch Server 4.1 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SUSE Manager Proxy 4.1 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SUSE Enterprise Storage 7 | busybox | 1.34.1-4.9.1 | SUSE-SU-2022:0135-1 |
| SUSE Enterprise Storage 6 | busybox +1 | 1.26.2-4.5.1 | SUSE-SU-2022:0135-1, SUSE-SU-2021:3531-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | busybox | 1.35.0-1.1 | openSUSE-SU-2024:11738-1 |
| openSUSE Leap 15.4 | busybox | 1.35.0-150400.3.3.1 | SUSE-SU-2022:3959-1 |
| openSUSE Leap 15.3 | busybox +1 | 1.26.2-4.5.1 | openSUSE-SU-2022:0135-1, openSUSE-SU-2021:3531-1 |
| openSUSE Leap 15.3 | virtualbox | 6.1.34-lp153.2.27.2 | openSUSE-SU-2022:0135-1 |
| openSUSE Leap 15.3 | virtualbox-kmp | 6.1.34-lp153.2.27.1 | openSUSE-SU-2022:0135-1 |
| openSUSE Leap 15.2 | busybox +1 | 1.26.2-lp152.5.3.1 | openSUSE-SU-2021:1408-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | busybox | 1.29.3-r10 | — |
| Alpine v3.23 | busybox | 1.29.3-r10 | — |
| Alpine v3.22 | busybox | 1.29.3-r10 | — |
| Alpine v3.21 | busybox | 1.29.3-r10 | — |
| Alpine v3.20 | busybox | 1.29.3-r10 | — |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | busybox | 1.29.3-r10 | — |
| Alpine v3.18 | busybox | 1.29.3-r10 | — |
| Alpine v3.17 | busybox | 1.29.3-r10 | — |
| Alpine v3.16 | busybox | 1.29.3-r10 | — |
| Alpine v3.15 | busybox | 1.29.3-r10 | — |
| Alpine v3.14 | busybox | 1.29.3-r10 | — |
| Alpine v3.13 | busybox | 1.29.3-r10 | — |
| Alpine v3.12 | busybox | 1.29.3-r10 | — |
| Alpine v3.11 | busybox | 1.29.3-r10 | — |
| Alpine v3.10 | busybox | 1.29.3-r10 | — |
| Alpine v3.9 | busybox | 1.29.3-r10 | — |
Advisories 12
- USN-3935-1 busybox vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- openSUSE-SU-2021:3531-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:3959-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0135-2 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0135-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0135-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11738-1 busybox-1.35.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2021:3531-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:4253-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2021:1408-1 Security update for busybox SUSE / openSUSE Security Updates · Feb 4, 2026
- VDE-2020-038 Pepperl+Fuchs: Multiple vulnerabilites in Comtrol IO-Link Master CERT@VDE · May 14, 2025
- ICSA-21-054-03 Advantech Spectre RT Industrial Routers CISA ICS & IT advisories · Feb 23, 2021
References
- https://git.busybox.net/busybox/commit/?id=6d3b4bb24da9a07c263f3c1acf8df85382ff562c
- https://busybox.net/news.html
- https://bugs.busybox.net/show_bug.cgi?id=11506
- USN-3935-1 vendor-advisory
- 20190904 SEC Consult SA-20190904-0 :: Multiple vulnerabilities in Cisco router series RV34X, RV26X and RV16X mailing-list
- 20190904 SEC Consult SA-20190904-0 :: Multiple vulnerabilities in Cisco router series RV34X, RV26X and RV16X mailing-list
- http://packetstormsecurity.com/files/154361/Cisco-Device-Hardcoded-Credentials-GNU-glibc-BusyBox.html