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
京ICP备10040895号
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