MIT Kerberos RPC库gssrpc__svcauth_gssapi()函数未初始化指针释放漏洞

CNNVD-ID编号	CNNVD-200706-434
CVE编号	CVE-2007-2442
发布时间	2006-06-01
更新时间	2021-02-03
漏洞类型	其他
漏洞来源	N/A
危险等级	超危
威胁类型	远程
厂商	mit

漏洞介绍

Kerberos是美国麻省理工学院（MIT）开发的一套网络认证协议，它采用客户端/服务器结构，并且客户端和服务器端均可对对方进行身份认证（即双重验证），可防止窃听、防止replay攻击等。MIT Kerberos 5（又名krb5）是美国麻省理工学院（MIT）开发的一套网络认证协议，它采用客户端/服务器结构，并且客户端和服务器端均可对对方进行身份认证（即双重验证），可防止窃听、防止replay攻击等。

Kerberos在处理畸形的RPC数据时存在漏洞，远程攻击者可能利用此漏洞导致服务崩溃。

Kerberos src/lib/rpc/svc_auth_gssapi.c文件中的gssrpc__svcauth_gssapi()函数声明了auth_gssapi_creds类型的自动变量creds，这个类型包含有gss_buffer_desc。如果gssrpc__svcauth_gssapi()接收到了长度为0的RPC凭据的话，就会跳转到error标签执行一些清除代码。这时creds中的gss_buffer_desc仍未被初始化，而清除代码试图对creds调用xdr_free()，然后xdr_free()试图释放gss_buffer_desc未初始化的value成员所指向的内存。很难利用释放无效指针执行任意代码，取决于特定malloc实现中的各种因素。成功攻击可能导致完全入侵Kerberos密钥数据库，破坏KDC主机的安全性(kadmind通常以root用户权限运行)，不成功的攻击也会导致kadmind崩溃。

漏洞补丁

目前厂商已经发布了升级补丁以修复这个安全问题，补丁下载链接：

Debian

------

Debian已经为此发布了一个安全公告(DSA-1323-1)以及相应补丁:

DSA-1323-1：New krb5 packages fix several vulnerabilities

链接：

http://www.debian.org/security/2007/dsa-1323

补丁下载：

Source archives:

http://security.debian.org/pool/updates/main/k/krb5/krb5_1.3.6-2sarge5.dsc

Size/MD5 checksum:782 b600466763baa4f89a8fed5a832eb9d3

http://security.debian.org/pool/updates/main/k/krb5/krb5_1.3.6-2sarge5.diff.gz

Size/MD5 checksum: 669293 0e9dfa39e8db2e0ce871ba40c46c925e

http://security.debian.org/pool/updates/main/k/krb5/krb5_1.3.6.orig.tar.gz

Size/MD5 checksum:6526510 7974d0fc413802712998d5fc5eec2919

Architecture independent components:

http://security.debian.org/pool/updates/main/k/krb5/krb5-doc_1.3.6-2sarge5_all.deb

Size/MD5 checksum: 718836 58c01536ff87db5d3492264349fe844c

Alpha architecture:

http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 115250 ac5498fab92f1047f47f45bb8269fcee

http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 247680 f5201ab228a84b6f25ed42e422f6fd92

http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum:62994 fd67dbebb83e11fe7a8d35b4a5209293

http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 137138 d44e84b8e1c36215644d8224ae685e96

http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum:89720 a4b4f7829ef043e7013887fdb967606f

http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum:72246 cf93e00c42669deba711fcfbde5285c8

http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 144880 e71073e49208fae27ef0a20c7920ad48

http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 201848 7e5171239d1e3970665029a2286acbb4

http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 861082 4017652625bc8408d5e1eb3f056699c4

http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.3.6-2sarge5_alpha.deb

Size/MD5 checksum: 422580 385ae85ece57a191de28006b2b1ed342

AMD64 architecture:

http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 104806 d3cb00189b4a3860ed2c89620733d4bb

http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 216896 c33630904c3b747231ab395734213076

http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum:56952 7a55c1a696cf6d7afe84fdbc0ecc59c5

http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 124744 600f391ee2adc80b057309ccd45b0748

http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum:82710 8baedacdf63faf0bf27c41997f15a0d7

http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum:63508 9b9d4ab137302d171649de86dbd5f2a7

http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 137754 536e88b5bdab0b8385fdd151d7295555

http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 177638 47af31f544051191e34a81bb230f3e69

http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 652300 64c39da5cd28173831c590c1a61024e1

http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.3.6-2sarge5_amd64.deb

Size/MD5 checksum: 369328 e69e658a600a340b7a981052cc93ba9f

ARM architecture:

http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.3.6-2sarge5_arm.deb

Size/MD5 checksum:93646 faaef2bab601737cacaf68e76e3dbf34

http://security.debian.org/pool/updates/main/k/krb5/krb5-c

参考网址

来源:SECUNIA

链接：http://secunia.com/advisories/25801
来源:SECUNIA

链接：http://secunia.com/advisories/25800
来源:SECUNIA

链接：http://secunia.com/advisories/25888
来源:SECUNIA

链接：http://secunia.com/advisories/27706
来源:UBUNTU

链接：http://www.ubuntu.com/usn/usn-477-1
来源:SECUNIA

链接：http://secunia.com/advisories/25841
来源:CONFIRM

链接：http://docs.info.apple.com/article.html?artnum=306172
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2010/1574
来源:HP

链接：http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c02257427
来源:SECUNIA

链接：http://secunia.com/advisories/25894
来源:APPLE

链接：http://lists.apple.com/archives/security-announce//2007/Jul/msg00004.html
来源:SECUNIA

链接：http://secunia.com/advisories/25890
来源:CERT

链接：http://www.us-cert.gov/cas/techalerts/TA07-177A.html
来源:XF

链接：https://exchange.xforce.ibmcloud.com/vulnerabilities/35082
来源:OVAL

链接：https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10631
来源:SECUNIA

链接：http://secunia.com/advisories/25911
来源:REDHAT

链接：http://www.redhat.com/support/errata/RHSA-2007-0562.html
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2007/2354
来源:SECUNIA

链接：http://secunia.com/advisories/40346
来源:CONFIRM

链接：https://secure-support.novell.com/KanisaPlatform/Publishing/773/3248163_f.SAL_Public.html
来源:SUNALERT

链接：http://sunsolve.sun.com/search/document.do?assetkey=1-26-102914-1
来源:TRUSTIX

链接：http://www.trustix.org/errata/2007/0021/
来源:SECTRACK

链接：http://www.securitytracker.com/id?1018293
来源:REDHAT

链接：http://www.redhat.com/support/errata/RHSA-2007-0384.html
来源:GENTOO

链接：http://security.gentoo.org/glsa/glsa-200707-11.xml
来源:BID

链接：https://www.securityfocus.com/bid/24655
来源:SECUNIA

链接：http://secunia.com/advisories/25821
来源:DEBIAN

链接：https://www.debian.org/security/2007/dsa-1323
来源:BUGTRAQ

链接：http://www.securityfocus.com/archive/1/472432/100/0/threaded
来源:SECUNIA

链接：http://secunia.com/advisories/25870
来源:OSVDB

链接：http://osvdb.org/36596
来源:OVAL

链接：https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7344
来源:BID

链接：https://www.securityfocus.com/bid/25159
来源:SECUNIA

链接：http://secunia.com/advisories/25814
来源:SECUNIA

链接：http://secunia.com/advisories/26228
来源:CERT-VN

链接：http://www.kb.cert.org/vuls/id/356961
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2007/2491
来源:SECUNIA

链接：http://secunia.com/advisories/26909
来源:CONFIRM

链接：https://issues.rpath.com/browse/RPL-1499
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2007/2732
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2007/3229
来源:BUGTRAQ

链接：http://www.securityfocus.com/archive/1/472288/100/0/threaded
来源:SUSE

链接：http://www.novell.com/linux/security/advisories/2007_38_krb5.html
来源:BUGTRAQ

链接：http://www.securityfocus.com/archive/1/472507/30/5970/threaded
来源:VUPEN

链接：http://www.vupen.com/english/advisories/2007/2337
来源:FULLDISC

链接：http://lists.grok.org.uk/pipermail/full-disclosure/2007-September/065902.html
来源:SECUNIA

链接：http://secunia.com/advisories/26235
来源:CONFIRM

链接：http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2007-004.txt
来源:CONFIRM

链接：http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2007-004.txt
来源:MANDRIVA

链接：http://www.mandriva.com/security/advisories?name=MDKSA-2007:137

受影响实体

Mit Kerberos:5-1.6.1

信息来源

http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-200706-434