Busybox: busybox: udhcpc integer underflow in dhcp packet length calculation causes denial of service
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 6 | unknown | — |
| Red Hat | Red Hat Hardened Images | affected | — |
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Busybox | Busybox |
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Vendor Workaround
If feasible, use udhcpc in LISTEN_KERNEL mode instead of LISTEN_RAW, or use an alternative DHCP client (dhclient, systemd-networkd). Restrict DHCP traffic on the local segment (for example DHCP snooping on switches).
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.189% probability within 30 days)
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ssvc
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| First Time appeared |
Redhat rhel Els
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| CPEs | cpe:/o:redhat:rhel_els:6 | |
| Vendors & Products |
Redhat rhel Els
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| Metrics |
threat_severity
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threat_severity
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| First Time appeared |
Busybox
Busybox busybox |
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| Vendors & Products |
Busybox
Busybox busybox |
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| Description | A flaw was found in BusyBox's udhcpc DHCP client. When processing raw DHCP packets, the client replaces the validated packet length with an attacker-controlled value from the IP header without re-validating the minimum size. This leads to an integer underflow when subtracting header sizes, causing a subsequent memory copy with a massively oversized length. An attacker on the same network segment can send a specially crafted packet to crash the DHCP client, resulting in denial of service and loss of network connectivity. | |
| Title | Busybox: busybox: udhcpc integer underflow in dhcp packet length calculation causes denial of service | |
| First Time appeared |
Redhat
Redhat hummingbird |
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| Weaknesses | CWE-191 | |
| CPEs | cpe:/a:redhat:hummingbird:1 | |
| Vendors & Products |
Redhat
Redhat hummingbird |
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| References |
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| Metrics |
cvssV3_1
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