3月14日GnuPG内置签名验证漏洞

信息提供：	安全公告（或线索）提供热线：51cto.editor@gmail.com
漏洞类别：	签名验证漏洞
攻击类型：	本地攻击
发布日期：	2006-03-09
更新日期：	2006-03-14
受影响系统：	GNU Privacy Guard < 1.4.2.2
安全系统：	GNU Privacy Guard 1.4.2.2
漏洞报告人：	Werner Koch （wk@gnupg.org） Tavis Ormandy （taviso@gentoo.org）
漏洞描述：	BUGTRAQ  ID: 17058 CVE(CAN) ID: CVE-2006-0049 GnuPG是基于OpenPGP标准的PGP加密、解密、签名工具。 GnuPG在处理邮件内置的签名时存在验证漏洞，攻击者可能利用此漏洞在邮件中插入额外的数据。 GnuPG在提取已签名的数据时，数据可能前置或后缀了签名没有没有覆盖到的额外数据，这样攻击者就可以利用签名消息注入额外的任意数据。
测试方法：	无
解决方法：	厂商补丁： Debian ------ Debian已经为此发布了一个安全公告（DSA-993-2）以及相应补丁: DSA-993-2：New GnuPG packages fix broken signature check 链接：http://www.debian.org/security/2005/dsa-993 补丁下载： Source archives: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5.dsc Size/MD5 checksum:      579 b34d5a5996b358e713e2e8bb71dc6404 http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5.diff.gz Size/MD5 checksum:     7866 5e36a3c06fae2b3d96a9db65988fffbd http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6.orig.tar.gz Size/MD5 checksum:  1941676 7c319a9e5e70ad9bc3bf0d7b5008a508 Alpha architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_alpha.deb Size/MD5 checksum:  1150716 ff72280db81dbc60041cd91a0d307ee6 ARM architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_arm.deb Size/MD5 checksum:   987194 1ca0bbdaaec049b128996cdd9f776834 Intel IA-32 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_i386.deb Size/MD5 checksum:   966800 52e985fbb5e9bcd7baa320c549b7b70c Intel IA-64 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_ia64.deb Size/MD5 checksum:  1271958 27317f852e24ce3784ec62aec0860c6a HP Precision architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_hppa.deb Size/MD5 checksum:  1059666 5b73bdfab02c7c8184b58db2c3e0b240 Motorola 680x0 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_m68k.deb Size/MD5 checksum:   942614 c15e8b65687c52530e48665669dde8c3 Big endian MIPS architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_mips.deb Size/MD5 checksum:  1035974 ce95aa0adb6060fc68119c4df3492293 Little endian MIPS architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_mipsel.deb Size/MD5 checksum:  1036400 f40b42f381d7f04004f219c16de542fc PowerPC architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_powerpc.deb Size/MD5 checksum:  1009720 8b0372d551b48829ce6be7d0f69f6559 IBM S/390 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_s390.deb Size/MD5 checksum:  1002210 deef79ef16b8f5bac2b32f912caac46c Sun Sparc architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.0.6-4woody5_sparc.deb Size/MD5 checksum:  1003974 2bf876aa4b6a50cb3aadb7ef2e233f69 Debian GNU/Linux 3.1 alias sarge - -------------------------------- Source archives: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3.dsc Size/MD5 checksum:      680 8f2f1848dcdfe9d143d8e9352ef918ca http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3.diff.gz Size/MD5 checksum:    19639 9ffb89fa0a770568ddd80a11e3eada78 http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1.orig.tar.gz Size/MD5 checksum:  4059170 1cc77c6943baaa711222e954bbd785e5 Alpha architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_alpha.deb Size/MD5 checksum:  2155538 07b4643bf4cd05639a261fa0b3fa6a89 AMD64 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_amd64.deb Size/MD5 checksum:  1963222 52cdf1bb1a228427abd31abff411a946 ARM architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_arm.deb Size/MD5 checksum:  1899232 c52b0d652506e2384340d67f8126a1b2 Intel IA-32 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_i386.deb Size/MD5 checksum:  1908754 cd9c2257b8c7149a92131abbdaef498c Intel IA-64 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_ia64.deb Size/MD5 checksum:  2324736 3553c75fac7cdc0a7d157c20aad4525c HP Precision architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_hppa.deb Size/MD5 checksum:  2004042 2bb61f214979d403de8e3eab35c4ef00 Motorola 680x0 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_m68k.deb Size/MD5 checksum:  1810978 8da1cbf5b8291ff54194010881832bf1 Big endian MIPS architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_mips.deb Size/MD5 checksum:  2000618 dfcf0ab7c9f5b3aada55bc27c1f1119d Little endian MIPS architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_mipsel.deb Size/MD5 checksum:  2007396 6d99bcd4559ef9a73d43cedd8b8d1680 PowerPC architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_powerpc.deb Size/MD5 checksum:  1957560 570ae516c68d6803aeafce048e0f978c IBM S/390 architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_s390.deb Size/MD5 checksum:  1966774 2f4a27beba4ff1fc96ef11d9e77b7ec1 Sun Sparc architecture: http://security.debian.org/pool/updates/main/g/gnupg/gnupg_1.4.1-1.sarge3_sparc.deb Size/MD5 checksum:  1897162 8520ccf5a05546d18a641a480b5926ac 补丁安装方法： 1. 手工安装补丁包： 首先，使用下面的命令来下载补丁软件： # wget url  (url是补丁下载链接地址) 然后，使用下面的命令来安装补丁：   # dpkg -i file.deb (file是相应的补丁名) 2. 使用apt-get自动安装补丁包： 首先，使用下面的命令更新内部数据库： # apt-get update 然后，使用下面的命令安装更新软件包： # apt-get upgrade GNU --- 目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载： ftp://ftp.gnupg.org/gcrypt/ Gentoo ------ Gentoo已经为此发布了一个安全公告（GLSA-200603-08）以及相应补丁: GLSA-200603-08：GnuPG: Incorrect signature verification 链接：http://security.gentoo.org/glsa/glsa-200603-08.xml 所有GnuPG用户都应升级到最新版本: # emerge --sync # emerge --ask --oneshot --verbose ">=app-crypt/gnupg-1.4.2.2"

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