Alerta de Segurança Debian
DSA-266-1 krb5 -- várias vulnerabilidades
- Data do Alerta:
- 24 Mar 2003
- Pacotes Afetados:
- krb5
- Vulnerável:
- Sim
- Referência à base de dados de segurança:
- No dicionário CVE do Mitre: CVE-2003-0028, CVE-2003-0072, CVE-2003-0082, CVE-2003-0138, CVE-2003-0139.
Alertas, notas de incidentes e vulnerabilidades do CERT: VU#623217, VU#442569, VU#516825, CA-2003-10. - Informações adicionais:
-
Várias vulnerabilidades foram descobertas no krb5, uma implementação do MIT Kerberos.
- Um defeito de criptografia na versão 4 do protocolo Kerberos permite
que um atacante use um ataque de texto-plano selecionado para imitar
qualquer principal num domínio. Defeitos adicionais de criptografia
na implementação do krb4 incluídas na distribuição MIT krb5 permitem
o uso de ataques de cortar-e-colar para fabricar bilhetes krb4 para
clientes principal não autorizados se chaves três-DES forem usadas
para registrar serviços krb4. Esses ataques podem subverter toda a
infra-estrutura de autenticação Kerberos de um site.
A versão 5 do Kerberos não contém essa vulnerabilidade na criptografia. Sites que estão com Kerberos v4 totalmente desabilitado, incluindo a desativação de qualquer serviço de tradução krb5 para krb4, não estão vulneráveis.
- A implementação MIT Kerberos 5 inclui uma biblioteca derivada do SUNRPC. Ela contém checagens de comprimento, que são vulneráveis a um estouro de inteiro, que pode ser explorado para criar negações de serviço ou para obter acesso não autorizado a informações sensíveis.
- Existem problemas de buffer overrun e underrun no manuseio do principal de nomes em casos incomuns do Kerberos, tais como nomes sem componentes, nomes com um componente vazio, ou o serviço principal de nomes baseado em host, sem componentes host.
Esta versão do pacote krb5 muda o comportamento padrão e desabilita a autenticação cross-realm da versão 4 do Kerberos. Devido a natureza do problema, a autenticação cross-realm da versão 4 do Kerberos não pode ser segura e sites devem evitar seu uso. Uma nova opção (-X) é fornecida nos comandos krb5kdc e krb524d para reabilitar a autenticação cross-realm para aqueles sites que devem usar esta funcionalidade mas desejam ter as outras atualizações de segurança.
Para a distribuição estável (woody) esse problema foi corrigido na versão 1.2.4-5woody4.
A antiga distribuição estável (potato) não contém os pacotes krb5.
Para a distribuição estável (sid) esse problema será corrigido em breve.
Nós recomendamos que você atualize seu pacote krb5.
- Um defeito de criptografia na versão 4 do protocolo Kerberos permite
que um atacante use um ataque de texto-plano selecionado para imitar
qualquer principal num domínio. Defeitos adicionais de criptografia
na implementação do krb4 incluídas na distribuição MIT krb5 permitem
o uso de ataques de cortar-e-colar para fabricar bilhetes krb4 para
clientes principal não autorizados se chaves três-DES forem usadas
para registrar serviços krb4. Esses ataques podem subverter toda a
infra-estrutura de autenticação Kerberos de um site.
- Corrigido em:
-
Debian GNU/Linux 3.0 (woody)
- Fonte:
- http://security.debian.org/pool/updates/main/k/krb5/krb5_1.2.4-5woody4.dsc
- http://security.debian.org/pool/updates/main/k/krb5/krb5_1.2.4-5woody4.diff.gz
- http://security.debian.org/pool/updates/main/k/krb5/krb5_1.2.4.orig.tar.gz
- http://security.debian.org/pool/updates/main/k/krb5/krb5_1.2.4-5woody4.diff.gz
- Componente independente de arquitetura:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-doc_1.2.4-5woody4_all.deb
- Alpha:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_alpha.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_alpha.deb
- ARM:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_arm.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_arm.deb
- Intel IA-32:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_i386.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_i386.deb
- Intel IA-64:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_ia64.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_ia64.deb
- HPPA:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_hppa.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_hppa.deb
- Motorola 680x0:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_m68k.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_m68k.deb
- Big endian MIPS:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_mips.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_mips.deb
- Little endian MIPS:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_mipsel.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_mipsel.deb
- PowerPC:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_powerpc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_powerpc.deb
- IBM S/390:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_s390.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_s390.deb
- Sun Sparc:
- http://security.debian.org/pool/updates/main/k/krb5/krb5-admin-server_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-ftpd_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-kdc_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-rsh-server_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-telnetd_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-user_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkadm55_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb5-dev_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/libkrb53_1.2.4-5woody4_sparc.deb
- http://security.debian.org/pool/updates/main/k/krb5/krb5-clients_1.2.4-5woody4_sparc.deb
Checksums MD5 dos arquivos listados estão disponíveis no alerta original.