Ejecución de código con a2ps
|
Vulnerability classification
|
Property |
Value |
Confidence level |
Oficial |
Impact |
Obtener acceso |
Dificulty |
Avanzado |
Required attacker level |
Acceso remoto con cuenta |
System information
|
Property |
Value |
Affected manufacturer |
GNU/Linux |
Affected software |
GNU a2ps 4.13, 4.13b
FreeBSD
Mandrake Linux 9.2
Mandrake Linux 9.2/AMD64
Mandrake Linux 10.0
Mandrake Linux 10.0/AMD64
Mandrake Linux 10.1
Mandrake Linux 10.1/X86_64
Mandrake Linux Corporate Server 2.1
Mandrake Linux Corporate Server 2.1/X86_64 |
Description
|
La apliación a2ps no valida correctamente los nombres de fichero.
Esta circunstancia podría ser aprovechada por un atacante con cuenta en el sistema para, creando ficheros con nombres especiales dentro de determinados directorios en que la víctima ejecuta a2ps, ejecutar comandos con los privilegios de la víctima. |
Solution
|
Aplique los mecanismos de actualización propios de su sistema, o bien descargue las fuentes del software y compílelas usted mismo.
Actualización de Software
GNU a2ps
Página oficial
http://www.gnu.org/software/a2ps/
FreeBSD
Aplique el parche proporcionado por el fabricante
http://www.freebsd.org/cgi/cvsweb.cgi/~checkout~/ports/print/a2ps-letter/files/patch-select.c?rev=1.1&content-type=text/plain
Mandrake Linux
Mandrake Linux 9.2
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/9.2/RPMS/a2ps-4.13b-5.1.92mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/9.2/RPMS/a2ps-devel-4.13b-5.1.92mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/9.2/RPMS/a2ps-static-devel-4.13b-5.1.92mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/9.2/SRPMS/a2ps-4.13b-5.1.92mdk.src.rpm
Mandrake Linux 9.2/AMD64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/9.2/RPMS/a2ps-4.13b-5.1.92mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/9.2/RPMS/a2ps-devel-4.13b-5.1.92mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/9.2/RPMS/a2ps-static-devel-4.13b-5.1.92mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/9.2/SRPMS/a2ps-4.13b-5.1.92mdk.src.rpm
Mandrake Linux 10.0
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/a2ps-4.13b-5.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/a2ps-devel-4.13b-5.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/a2ps-static-devel-4.13b-5.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/SRPMS/a2ps-4.13b-5.1.100mdk.src.rpm
Mandrake Linux 10.0/AMD64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/a2ps-4.13b-5.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/a2ps-devel-4.13b-5.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/a2ps-static-devel-4.13b-5.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/SRPMS/a2ps-4.13b-5.1.100mdk.src.rpm
Mandrake Linux 10.1
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.1/RPMS/a2ps-4.13b-5.1.101mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.1/RPMS/a2ps-devel-4.13b-5.1.101mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.1/RPMS/a2ps-static-devel-4.13b-5.1.101mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.1/SRPMS/a2ps-4.13b-5.1.101mdk.src.rpm
Mandrake Linux 10.1/X86_64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/10.1/RPMS/a2ps-4.13b-5.1.101mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/10.1/RPMS/a2ps-devel-4.13b-5.1.101mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/10.1/RPMS/a2ps-static-devel-4.13b-5.1.101mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/10.1/SRPMS/a2ps-4.13b-5.1.101mdk.src.rpm
Mandrake Linux Corporate Server 2.1
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/2.1/RPMS/a2ps-4.13-14.1.C21mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/2.1/RPMS/a2ps-devel-4.13-14.1.C21mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/2.1/RPMS/a2ps-static-devel-4.13-14.1.C21mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/2.1/SRPMS/a2ps-4.13-14.1.C21mdk.src.rpm
Mandrake Linux Corporate Server 2.1/X86_64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/2.1/RPMS/a2ps-4.13-14.1.C21mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/2.1/RPMS/a2ps-devel-4.13-14.1.C21mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/2.1/RPMS/a2ps-static-devel-4.13-14.1.C21mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/2.1/SRPMS/a2ps-4.13-14.1.C21mdk.src.rpm
Debian Linux
Debian 3.0 "Woody"
Fuentes
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1.dsc
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1.diff.gz
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b.orig.tar.gz
Alpha
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_alpha.deb
ARM
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_arm.deb
Intel IA-32
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_i386.deb
Intel IA-64
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_ia64.deb
HPPA
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_hppa.deb
Motorola 680x0
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_m68k.deb
Big endian MIPS
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_mips.deb
Little endian MIPS
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_mipsel.deb
PowerPC
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_powerpc.deb
IBM S/390
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_s390.deb
Sun Sparc
http://security.debian.org/pool/updates/main/a/a2ps/a2ps_4.13b-16woody1_sparc.deb |
Standar resources
|
Property |
Value |
CVE |
CAN-2004-1170 |
BID |
11025 |
Other resources
|
SecuriTeam: a2ps Executing Shell Commands From File Name
http://www.securiteam.com/unixfocus/5MP0N2KDPA.html
Mandrakesoft Security Advisory MDKSA-2004:140
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:140
Debian Security Advisory DSA-612
http://www.debian.org/security/2004/dsa-612 |
Version history
|
Version |
Comments |
Date |
1.0
|
Aviso emitido
|
2004-12-01
|
1.1
|
Aviso emitido por Debian Linux (DSA 612-1)
|
2004-12-21
|