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CVE-2016-2177 is a low-severity flaw in OpenSSL 1.0.1 and 1.0.2 through 1.0.2h arising from heap-buffer bounds checks that use pointer arithmetic such as p + len > limit. When an externally supplied TLS length exceeds the allocated buffer size, evaluating p + len is undefined behavior in C. Under particular memory layouts, pointer-address overflow can make the result wrap below the buffer limit and bypass the intended validation. Affected parsing paths include TLS ClientHello cipher-suite and extension processing. OpenSSL 1.1.0 is not affected because the relevant code had been refactored.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A low-severity OpenSSL vulnerability involving undefined behavior in pointer arithmetic, affecting OpenSSL 1.0.2 and 1.0.1.
A low severity OpenSSL vulnerability caused by undefined pointer arithmetic in OpenSSL 1.0.2 and 1.0.1, which in unusual scenarios could lead to out-of-bounds processing and likely denial of service crashes while parsing ClientHello ciphersuites or extensions.
OpenSSL undefined pointer arithmetic issue that could lead to memory safety problems when processing externally supplied lengths.
Multiple OpenSSL integer-overflow flaws in pointer arithmetic that could allow a remote attacker to crash an affected TLS/SSL server or client.
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.