Libevent 2.1.13-stable Security Vulnerabilities Summary

Summary of Vulnerabilities in Libevent 2.1.13-stable Vulnerability Overview The Libevent 2.1.13-stable version includes multiple security fixes, primarily affecting the following modules: , , , , , and . Scope of Impact evtag and evrpc: - Fixed an out-of-bounds read vulnerability in . - Fixed an integer overflow vulnerability in . evhttp: - Mitigated HTTP header sniffing attacks. - Restricted HTTP header parsing to prevent request smuggling attacks. - Enforced stricter handling of CRLF and characters to prevent parser mismatch attacks. - Fixed a heap out-of-bounds write vulnerability that could occur when using AF_UNIX sockets and compiling libevent. evbuffer and bufferevent: - Fixed a dangling pointer issue in . evdns: - Fixed an out-of-bounds write vulnerability in when constructing DNS responses. Sample Code: - Avoided the use of in . Remediation evtag and evrpc: - Fixed an out-of-bounds read vulnerability in . - Fixed an integer overflow vulnerability in . evhttp: - Mitigated HTTP header sniffing attacks. - Restricted HTTP header parsing to prevent request smuggling attacks. - Enforced stricter handling of CRLF and characters to prevent parser mismatch attacks. - Fixed a heap out-of-bounds write vulnerability that could occur when using AF_UNIX sockets and compiling libevent. evbuffer and bufferevent: - Fixed a dangling pointer issue in . evdns: - Fixed an out-of-bounds write vulnerability in when constructing DNS responses. Sample Code: - Avoided the use of in . POC Code or Exploit Code No specific POC code or exploit code was provided in the page. Summary The Libevent 2.1.13-stable version contains multiple security fixes, primarily affecting the , , , , , and modules. The fixes address issues such as out-of-bounds reads, integer overflows, HTTP header sniffing, request smuggling, parser mismatches, heap out-of-bounds writes, and dangling pointers. Affected users are advised to upgrade to this version as soon as possible.

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Libevent 2.1.13-stable Security Vulnerabilities Summary

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