net-snmp snmp_pdu_parse varBind cleanup flaw
CVE-2015-5621 affects net-snmp 5.7.2 and earlier. The vulnerability is in the snmp_pdu_parse function in snmp_api.c. When parsing of an SNMP PDU fails, the function does not properly remove or clean up the varBind variable in a netsnmp_variable_list item. This improper state handling can be triggered by a crafted SNMP packet sent to a vulnerable service using the affected net-snmp component. The resulting memory corruption or invalid memory state can lead to process termination and, according to the provided description, may also permit arbitrary code execution.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
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Remediation
Patch, then assume compromise.
Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Affected products & vendors
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.
Recent activity
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability referenced as part of the BRIDGE:BREAK findings affecting the discussed serial-to-IP converter products.
A dependency on a vulnerable third-party component affecting silex technology SD-330AC and AMC Manager through CVE-2015-5621.
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.