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CVE-2005-1513 is an integer overflow in qmail's stralloc_readyplus function on 64-bit platforms with large virtual memory availability. During processing of a very large SMTP message, specifically a nearly 4 GB header line that is later handled by qmail-local via getln(), the size calculation in GEN_ALLOC_readyplus() can wrap, causing alloc_re() to reallocate a buffer to a size smaller than required. Subsequent copying then produces a large heap-based buffer overflow. Qualys reported that this condition is reachable remotely in default Debian qmail deployments because qmail-local, unlike qmail-smtpd, is not memory-limited by default. Their analysis showed the overflow can be turned into controlled memory corruption and ultimately arbitrary command execution by corrupting heap metadata and redirecting a later open() call to system().
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An integer overflow in qmail's stralloc_readyplus that Qualys says can be exploited remotely in a default installation to achieve remote code execution via qmail-local.
A vulnerability chain where an integer overflow in a mail program leads to a buffer overflow; notable for later reassessment as easier to exploit.
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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.