Bugtraq ID: 47123 IPcomp是一款IP有效载荷压缩协议，为IP层提供无损耗压缩。 源自NetBSD/KAME的IPComp实现，未压缩负载的注入其代码类似如下： algo = ipcomp_algorithm_lookup(cpi); /* ... */ error = (*algo->decompress)(m, m->m_next, &newlen); /* ... */ if (nxt != IPPROTO_DONE) { if ((inetsw[ip_protox[nxt]].pr_flags & PR_LASTHDR) != 0 && ipsec4_in_reject(m, NULL)) { IPSEC_STATINC(IPSEC_STAT_IN_POLVIO); goto fail; } (*inetsw[ip_protox[nxt]].pr_input)(m, off, nxt); } else m_freem(m); /* ... */ 这里的inetsw[]包含的是其所支持的协议，nxt是协议号，一般相关于ip->ip_p (查看 http://www.iana.org/assignments/protocol-numbers/protocol-numbers.xml)，但是在这个情况却来自ipcomp->comp_nxt，m是用于调整未压缩有效负载指向的mbuf结构。 未压缩报文分派到ipcomp协议处理器所提供的相应的协议处理程序，这个递归实现没有正确检查栈溢出，因此可触发一个远程未验证内核内存破坏漏洞。 NetBSD/KAME网络栈用于多个操作系统，如Xnu, FTOS，嵌入设备和网络应用设备，早期的FreeBSD/OpenBSD版本。 NetBSD NetBSD 5.0.2 NetBSD NetBSD 5.0.1 NetBSD NetBSD Current NetBSD NetBSD 5.1 NetBSD NetBSD 5.0 RC3 NetBSD NetBSD 5.0 KAME KAME project 0 FreeBSD FreeBSD 6.0 .x FreeBSD FreeBSD 6.0 -STABLE FreeBSD FreeBSD 6.0 -RELEASE FreeBSD FreeBSD 5.5 -STABLE FreeBSD FreeBSD 5.5 -RELEASE FreeBSD FreeBSD 5.4 -RELENG FreeBSD FreeBSD 5.4 -RELEASE FreeBSD FreeBSD 5.4 -PRERELEASE FreeBSD FreeBSD 5.3 -STABLE FreeBSD FreeBSD 5.3 -RELENG FreeBSD FreeBSD 5.3 -RELEASE FreeBSD FreeBSD 5.3 FreeBSD FreeBSD 5.2.1 -RELEASE FreeBSD FreeBSD 5.2 -RELENG FreeBSD FreeBSD 5.2 -RELEASE FreeBSD FreeBSD 5.2 FreeBSD FreeBSD 5.1 -RELENG FreeBSD FreeBSD 5.1 -RELEASE/Alpha FreeBSD FreeBSD 5.1 -RELEASE-p5 FreeBSD FreeBSD 5.1 -RELEASE FreeBSD FreeBSD 5.1 FreeBSD FreeBSD 5.0 .x FreeBSD FreeBSD 5.0 -RELENG FreeBSD FreeBSD 5.0 -RELEASE-p14 FreeBSD FreeBSD 5.0 alpha FreeBSD FreeBSD 5.0 FreeBSD FreeBSD 4.11 -STABLE FreeBSD FreeBSD 4.11 -RELENG FreeBSD FreeBSD 4.11 -RELEASE-p3 FreeBSD FreeBSD 4.11 -RELEASE-p20 FreeBSD FreeBSD 4.11 -RELEASE FreeBSD FreeBSD 4.10 -RELENG FreeBSD FreeBSD 4.10 -RELEASE-p8 FreeBSD FreeBSD 4.10 -RELEASE FreeBSD FreeBSD 4.10 FreeBSD FreeBSD 4.9 -RELENG FreeBSD FreeBSD 4.9 -PRERELEASE FreeBSD FreeBSD 4.9 FreeBSD FreeBSD 4.8 -RELENG FreeBSD FreeBSD 4.8 -RELEASE-p7 FreeBSD FreeBSD 4.8 -PRERELEASE FreeBSD FreeBSD 4.8 FreeBSD FreeBSD 4.7 -STABLE FreeBSD FreeBSD 4.7 -RELENG FreeBSD FreeBSD 4.7 -RELEASE-p17 FreeBSD FreeBSD 4.7 -RELEASE FreeBSD FreeBSD 4.7 FreeBSD FreeBSD 4.6.2 FreeBSD FreeBSD 4.6 -STABLE FreeBSD FreeBSD 4.6 -RELENG FreeBSD FreeBSD 4.6 -RELEASE-p20 FreeBSD FreeBSD 4.6 -RELEASE FreeBSD FreeBSD 4.6 FreeBSD FreeBSD 4.5 -STABLEpre2002-03-07 FreeBSD FreeBSD 4.5 -STABLE FreeBSD FreeBSD 4.5 -RELENG FreeBSD FreeBSD 4.5 -RELEASE-p32 FreeBSD FreeBSD 4.5 -RELEASE FreeBSD FreeBSD 4.5 FreeBSD FreeBSD 4.4 -STABLE FreeBSD FreeBSD 4.4 -RELENG FreeBSD FreeBSD 4.4 -RELEASE-p42 FreeBSD FreeBSD 4.4 FreeBSD FreeBSD 4.3 -STABLE FreeBSD FreeBSD 4.3 -RELENG FreeBSD FreeBSD 4.3 -RELEASE-p38 FreeBSD FreeBSD 4.3 -RELEASE FreeBSD FreeBSD 4.3 FreeBSD FreeBSD 4.2 -STABLEpre122300 FreeBSD FreeBSD 4.2 -STABLEpre050201 FreeBSD FreeBSD 4.2 -STABLE FreeBSD FreeBSD 4.2 -RELEASE FreeBSD FreeBSD 4.2 FreeBSD FreeBSD 4.1.1 -STABLE FreeBSD FreeBSD 4.1.1 -RELEASE FreeBSD FreeBSD 4.1.1 FreeBSD FreeBSD 4.1 FreeBSD FreeBSD 4.0 .x FreeBSD FreeBSD 4.0 -RELENG FreeBSD FreeBSD 4.0 alpha FreeBSD FreeBSD 4.0 FreeBSD FreeBSD 3.5.1 -STABLEpre2001-07-20 FreeBSD FreeBSD 3.5.1 -STABLE FreeBSD FreeBSD 3.5.1 -RELEASE FreeBSD FreeBSD 3.5.1 FreeBSD FreeBSD 3.5 x FreeBSD FreeBSD 3.5 -STABLEpre122300 FreeBSD FreeBSD 3.5 -STABLEpre050201 FreeBSD FreeBSD 3.5 -STABLE FreeBSD FreeBSD 3.5 FreeBSD FreeBSD 3.4 x FreeBSD FreeBSD 3.4 FreeBSD FreeBSD 3.3 x FreeBSD FreeBSD 3.3 FreeBSD FreeBSD 3.2 x FreeBSD FreeBSD 3.2 FreeBSD FreeBSD 3.1 x FreeBSD FreeBSD 3.1 FreeBSD FreeBSD 3.0 -RELENG FreeBSD FreeBSD 3.0 FreeBSD FreeBSD 2.2.8 FreeBSD FreeBSD 2.2.7 FreeBSD FreeBSD 2.2.6 FreeBSD FreeBSD 2.2.5 FreeBSD FreeBSD 2.2.4 FreeBSD FreeBSD 2.2.3 FreeBSD FreeBSD 2.2.2 FreeBSD FreeBSD 2.2 x FreeBSD FreeBSD 2.2 FreeBSD FreeBSD 2.1.7 .1 FreeBSD FreeBSD 2.1.7 FreeBSD FreeBSD 2.1.6 .1 FreeBSD FreeBSD 2.1.6 FreeBSD FreeBSD 2.1.5 FreeBSD FreeBSD 2.1 x FreeBSD FreeBSD 2.1 FreeBSD FreeBSD 2.0.5 FreeBSD FreeBSD 2.0 FreeBSD FreeBSD 1.1.5 .1 FreeBSD FreeBSD 1.1.5 FreeBSD FreeBSD 8.1-RELEASE FreeBSD FreeBSD 8.1-PRERELEASE FreeBSD FreeBSD 8.0-STABLE FreeBSD FreeBSD 8.0-RELEASE FreeBSD FreeBSD 7.3-STABLE FreeBSD FreeBSD 7.3-RELEASE-p1 FreeBSD FreeBSD 7.2-STABLE FreeBSD FreeBSD 7.2-RELEASE-p4 FreeBSD FreeBSD 7.2-RELEASE-p1 FreeBSD FreeBSD 7.2-RC2 FreeBSD FreeBSD 7.2-PRERELEASE FreeBSD FreeBSD 7.1-STABLE FreeBSD FreeBSD 7.1-RELEASE-p6 FreeBSD FreeBSD 7.1-RELEASE-p5 FreeBSD FreeBSD 7.1-RELEASE-p4 FreeBSD FreeBSD 7.1 Rc1 FreeBSD FreeBSD 7.1 -RELEASE-p2 FreeBSD FreeBSD 7.1 -RELEASE-p1 FreeBSD FreeBSD 7.1 -PRE-RELEASE FreeBSD FreeBSD 7.1 FreeBSD FreeBSD 7.0-STABLE FreeBSD FreeBSD 7.0-RELEASE-p8 FreeBSD FreeBSD 7.0-RELEASE-p3 FreeBSD FreeBSD 7.0-RELEASE-p12 FreeBSD FreeBSD 7.0-RELEASE-p11 FreeBSD FreeBSD 7.0-RELEASE FreeBSD FreeBSD 7.0 BETA4 FreeBSD FreeBSD 7.0 -RELENG FreeBSD FreeBSD 7.0 -RELEASE-p9 FreeBSD FreeBSD 7.0 -PRERELEASE FreeBSD FreeBSD 7.0 FreeBSD FreeBSD 6.4-RELENG FreeBSD FreeBSD 6.4-RELEASE-p5 FreeBSD FreeBSD 6.4-RELEASE-p4 FreeBSD FreeBSD 6.4-RELEASE-p2 FreeBSD FreeBSD 6.4 -STABLE FreeBSD FreeBSD 6.4 -RELEASE-p3 FreeBSD FreeBSD 6.4 -RELEASE FreeBSD FreeBSD 6.4 FreeBSD FreeBSD 6.3-RELEASE-p11 FreeBSD FreeBSD 6.3-RELEASE-p10 FreeBSD FreeBSD 6.3 -RELENG FreeBSD FreeBSD 6.3 -RELEASE-p9 FreeBSD FreeBSD 6.3 -RELEASE-p8 FreeBSD FreeBSD 6.3 -RELEASE-p6 FreeBSD FreeBSD 6.3 FreeBSD FreeBSD 6.2 -STABLE FreeBSD FreeBSD 6.2 -RELENG FreeBSD FreeBSD 6.2 FreeBSD FreeBSD 6.1 -STABLE FreeBSD FreeBSD 6.1 -RELEASE-p10 FreeBSD FreeBSD 6.1 -RELEASE FreeBSD FreeBSD 6.1 FreeBSD FreeBSD 6.0-RELENG FreeBSD FreeBSD 6.0 -RELEASE-p5 FreeBSD FreeBSD 6.0 FreeBSD FreeBSD 5.5 FreeBSD FreeBSD 5.4-STABLE FreeBSD FreeBSD 5.4 FreeBSD FreeBSD 5.2.1 FreeBSD FreeBSD 4.11 FreeBSD FreeBSD 4.10-PRERELEASE FreeBSD FreeBSD 3.x FreeBSD FreeBSD 2.x FreeBSD FreeBSD 2.2.1 FreeBSD FreeBSD 2.0.1 FreeBSD FreeBSD 1.5 FreeBSD FreeBSD 1.2 FreeBSD FreeBSD 1.1 FreeBSD FreeBSD 1.0 FreeBSD FreeBSD 0.4 1 FreeBSD FreeBSD -current Cosmicperl Directory Pro 10.0.3 Apple Mac OS X Server 10.6.6 Apple Mac OS X Server 10.6.5 Apple Mac OS X Server 10.6.5 Apple Mac OS X Server 10.6.4 Apple Mac OS X Server 10.6.3 Apple Mac OS X Server 10.6.2 Apple Mac OS X Server 10.6.1 Apple Mac OS X Server 10.5.8 Apple Mac OS X Server 10.5.7 Apple Mac OS X Server 10.5.6 Apple Mac OS X Server 10.5.5 Apple Mac OS X Server 10.5.4 Apple Mac OS X Server 10.5.3 Apple Mac OS X Server 10.5.2 Apple Mac OS X Server 10.5.1 Apple Mac OS X Server 10.5 Apple Mac OS X Server 10.4.11 Apple Mac OS X Server 10.4.10 Apple Mac OS X Server 10.4.9 Apple Mac OS X Server 10.4.8 Apple Mac OS X Server 10.4.7 Apple Mac OS X Server 10.4.6 Apple Mac OS X Server 10.4.5 Apple Mac OS X Server 10.4.4 Apple Mac OS X Server 10.4.3 Apple Mac OS X Server 10.4.2 Apple Mac OS X Server 10.4.1 Apple Mac OS X Server 10.4 Apple Mac OS X Server 10.3.9 Apple Mac OS X Server 10.3.8 Apple Mac OS X Server 10.3.7 Apple Mac OS X Server 10.3.6 Apple Mac OS X Server 10.3.5 Apple Mac OS X Server 10.3.4 Apple Mac OS X Server 10.3.3 Apple Mac OS X Server 10.3.2 Apple Mac OS X Server 10.3.1 Apple Mac OS X Server 10.3 Apple Mac OS X Server 10.2.8 Apple Mac OS X Server 10.2.7 Apple Mac OS X Server 10.2.6 Apple Mac OS X Server 10.2.5 Apple Mac OS X Server 10.2.4 Apple Mac OS X Server 10.2.3 Apple Mac OS X Server 10.2.2 Apple Mac OS X Server 10.2.1 Apple Mac OS X Server 10.2 Apple Mac OS X Server 10.1.5 Apple Mac OS X Server 10.1.4 Apple Mac OS X Server 10.1.3 Apple Mac OS X Server 10.1.2 Apple Mac OS X Server 10.1.1 Apple Mac OS X Server 10.1 Apple Mac OS X Server 10.0 Apple Mac Os X Server 10.6.7 Apple Mac OS X Server 10.6 Apple Mac OS X Server 10.5 Apple Mac OS X 10.6.5 Apple Mac OS X 10.6.4 Apple Mac OS X 10.6.3 Apple Mac OS X 10.6.2 Apple Mac OS X 10.6.1 Apple Mac OS X 10.5.8 Apple Mac OS X 10.5.7 Apple Mac OS X 10.5.6 Apple Mac OS X 10.5.5 Apple Mac OS X 10.5.4 Apple Mac OS X 10.5.3 Apple Mac OS X 10.5.2 Apple Mac OS X 10.5.1 Apple Mac OS X 10.5 Apple Mac OS X 10.4.11 Apple Mac OS X 10.4.10 Apple Mac OS X 10.4.9 Apple Mac OS X 10.4.8 Apple Mac OS X 10.4.7 Apple Mac OS X 10.4.6 Apple Mac OS X 10.4.5 Apple Mac OS X 10.4.4 Apple Mac OS X 10.4.3 Apple Mac OS X 10.4.2 Apple Mac OS X 10.4.1 Apple Mac OS X 10.4 Apple Mac OS X 10.3.9 Apple Mac OS X 10.3.8 Apple Mac OS X 10.3.7 Apple Mac OS X 10.3.6 Apple Mac OS X 10.3.5 Apple Mac OS X 10.3.4 Apple Mac OS X 10.3.3 Apple Mac OS X 10.3.2 Apple Mac OS X 10.3.1 Apple Mac OS X 10.3 Apple Mac OS X 10.2.8 Apple Mac OS X 10.2.7 Apple Mac OS X 10.2.6 Apple Mac OS X 10.2.5 Apple Mac OS X 10.2.4 Apple Mac OS X 10.2.3 Apple Mac OS X 10.2.2 Apple Mac OS X 10.2.1 Apple Mac OS X 10.2 Apple Mac OS X 10.1.5 Apple Mac OS X 10.1.4 Apple Mac OS X 10.1.3 Apple Mac OS X 10.1.2 Apple Mac OS X 10.1.1 Apple Mac OS X 10.1 Apple Mac OS X 10.0.4 Apple Mac OS X 10.0.2 Apple Mac OS X 10.0.1 Apple Mac OS X 10.0 3 Apple Mac OS X 10.0 Apple Mac OS X 10.6 Apple Mac OS X 10.5 用户可参考如下测试方法： http://www.securityfocus.com/data/vulnerabilities/exploits/47123.zip 临时解决方案 受影响的服务器和设备可使用报文过滤器来阻止受影响代码执行，如在使用ipfw的系统上，可采用如下规则： # ipfw add deny proto ipcomp 在其他BSD系统上，可通过pfctl规则来代替。 厂商解决方案 NetBSD系统用户可参考如下供应商提供安全补丁： http://cvsweb.netbsd.org/bsdweb.cgi/src/sys/netinet6/ipcomp_input.c?rev=1.36&content-type=text/x-cvsweb-markup&only_with_tag=MAIN
