---------------------------------------------------------------------- We are millions! Join us to protect all Pc's Worldwide. Download the new Secunia PSI 3.0 available in 5 languages and share it with your friends: http://secunia.com/psi ---------------------------------------------------------------------- TITLE: ISC DHCP Multiple Denial of Service Vulnerabilities SECUNIA ADVISORY ID: SA50018 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/50018/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=50018 RELEASE DATE: 2012-07-25 DISCUSS ADVISORY: http://secunia.com/advisories/50018/#comments AVAILABLE ON SITE AND IN CUSTOMER AREA: * Last Update * Popularity * Comments * Criticality Level * Impact * Where * Solution Status * Operating System / Software * CVE Reference(s) http://secunia.com/advisories/50018/ ONLY AVAILABLE IN CUSTOMER AREA: * Authentication Level * Report Reliability * Secunia PoC * Secunia Analysis * Systems Affected * Approve Distribution * Remediation Status * Secunia CVSS Score * CVSS https://ca.secunia.com/?page=viewadvisory&vuln_id=50018 ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI: * AUTOMATED SCANNING http://secunia.com/vulnerability_scanning/personal/ http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/ DESCRIPTION: Multiple vulnerabilities have been reported in ISC DHCP, which can be exploited by malicious people to cause a DoS (Denial of Service). 1) An error when handling client identifiers can be exploited to trigger an endless loop and prevent the server from processing further client requests via a specially crafted packet. This vulnerability is versions 4.1-ESV through 4.1-ESV-R5, 4.1.2, 4.1.2-P1, and 4.2 (including 4.2.x-Px) through 4.2.4. 2) An error when handling client identifiers when running in DHCPv6 mode can be exploited to cause a buffer overflow and crash the server via a specially crafted packet. This vulnerability is reported in versions 4.2.0 through 4.2.4. 3) Two memory leak errors exist when processing messages and can be exploited to consume all memory and prevent the server from processing further requests by sending multiple requests to the server. This vulnerability is reported in versions 4.1.x and 4.2.x. SOLUTION: Update to version 4.1-ESV-R6 or 4.2.4-P1. PROVIDED AND/OR DISCOVERED BY: 1, 2) Markus Hietava, Codenomicon CROSS via CERT-FI 3) Reported by the vendor ORIGINAL ADVISORY: ISC: https://www.isc.org/software/dhcp/advisories/cve-2012-3571 https://www.isc.org/software/dhcp/advisories/cve-2012-3571 https://www.isc.org/software/dhcp/advisories/cve-2012-3954 CERT-FI: http://www.cert.fi/en/reports/2012/vulnerability636698.html OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXPLOIT: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help private users keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/advisories/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/advisories/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ----------------------------------------------------------------------