NULL pointer dereference in net-snmp GET-NEXT handling of nsVacmAccessTable
CVE-2022-24809 affects net-snmp prior to version 5.9.2. A user with read-only SNMP credentials can send a malformed OID in a GET-NEXT request targeting the nsVacmAccessTable, which triggers a NULL pointer dereference in the agent and causes the SNMP service to crash or become unresponsive. The issue is described as affecting net-snmp tooling related to SNMP and was noted by Citrix as impacting XenServer 8 through its use of net-snmp.
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Impact
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Exploits
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Affected products & vendors
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
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A vulnerability affecting XenServer 8 that could allow an attacker on the management network to crash or render the XenServer host SNMP service unresponsive (denial of service).
A net-snmp NULL pointer dereference vulnerability affecting XenServer 8 that may allow an attacker on the management network to cause the XenServer host SNMP service to crash or become unresponsive.
A net-snmp NULL pointer dereference vulnerability that may allow an attacker on the management network to crash or hang the XenServer host SNMP service.
The version that knows your environment.
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.