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CVE-2018-0173 is an incomplete input-validation vulnerability in Cisco IOS Software and Cisco IOS XE Software when restoring encapsulated DHCPv4 option 82 information. The affected software insufficiently validates encapsulated option 82 data in DHCPOFFER messages received from DHCPv4 servers. An unauthenticated remote attacker can send a crafted DHCPv4 packet to an affected device; after the device forwards it to a DHCPv4 server, processing option 82 information encapsulated in the server response can trigger an error and reload the device.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.