Apache Log4j Core Socket Appender TLS Hostname Verification Bypass
CVE-2025-68161 affects Apache Log4j Core Socket Appender in versions 2.0-beta9 through 2.25.2. The Socket Appender fails to perform TLS hostname verification of the peer certificate even when hostname verification is explicitly enabled via the verifyHostName configuration attribute or the log4j2.sslVerifyHostName system property. As a result, the appender may accept a certificate that chains to a trusted certification authority without verifying that the certificate identity matches the intended remote log receiver. This is a transport security validation flaw that can enable interception or redirection of log traffic in man-in-the-middle conditions.
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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
If you can’t patch tonight, do this now.
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
34 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in Oracle Communications addressed as part of a consolidated fix bundled with CVE-2026-34481.
A low-severity Apache Log4j exposure advisory affecting SAP NetWeaver AS Java, highlighting residual third-party library risk.
A medium-severity vulnerability affecting SAP Commerce Cloud related to Apache Log4j.
TLS hostname verification is not performed by Log4j Core Socket Appender even when configured, enabling MITM interception/redirection of log traffic under certain conditions.
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.