Vulnerability Bulletins |
Salto de validación de certificados en NTP |
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Vulnerability classification |
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| Property | Value |
| Confidence level | Oficial |
| Impact | Confidencialidad |
| Dificulty | Experto |
| Required attacker level | Acceso remoto sin cuenta a un servicio estandar |
System information |
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| Property | Value |
| Affected manufacturer | GNU/Linux |
| Affected software |
NTP 4.2.4 < 4.2.4p5 NTP 4.2.5 < 4.2.5p150 |
Description |
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Se ha descubierto una vulnerabilidad en NTP 4.2.x. La vulnerabilidad reside en un error en la comprobación del valor desde la función "EVP_VerifyFinal". Un atacante remoto podría saltar la validación de un certificado mediante una firma SSL/TLS especialmente diseñada para claves DSA y ECDSA. |
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Solution |
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Actualización de software Debian (DSA-1702-1) Debian Linux 4.0 Source http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1.dsc http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg.orig.tar.gz http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1.diff.gz Arquitectura independiente: http://security.debian.org/pool/updates/main/n/ntp/ntp-doc_4.2.2.p4+dfsg-2etch1_all.deb http://security.debian.org/pool/updates/main/n/ntp/ntp-simple_4.2.2.p4+dfsg-2etch1_all.deb http://security.debian.org/pool/updates/main/n/ntp/ntp-refclock_4.2.2.p4+dfsg-2etch1_all.deb alpha (DEC Alpha) http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_alpha.deb http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_alpha.deb amd64 (AMD x86_64 (AMD64)) http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_amd64.deb http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_amd64.deb hppa (HP PA RISC) http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_hppa.deb http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_hppa.deb i386 (Intel ia32) http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_i386.deb http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_i386.deb ia64 (Intel ia64) http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_ia64.deb http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_ia64.deb mipsel (MIPS (Little Endian)) http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_mipsel.deb http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_mipsel.deb powerpc (PowerPC) http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_powerpc.deb http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_powerpc.deb s390 (IBM S/390) http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_s390.deb http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_s390.deb sparc (Sun SPARC/UltraSPARC) http://security.debian.org/pool/updates/main/n/ntp/ntp_4.2.2.p4+dfsg-2etch1_sparc.deb http://security.debian.org/pool/updates/main/n/ntp/ntpdate_4.2.2.p4+dfsg-2etch1_sparc.deb Red Hat (RHSA-2009:0046-7) Red Hat Desktop (v. 4) Red Hat Enterprise Linux (v. 5 servidor) Red Hat Enterprise Linux AS (v. 4) Red Hat Enterprise Linux Desktop (v. 5 cliente) Red Hat Enterprise Linux ES (v. 4) Red Hat Enterprise Linux WS (v. 4) https://rhn.redhat.com/ Suse Linux Las actualizaciones pueden descargarse mediante YAST o del servidor FTP oficial de Suse Linux. |
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Standar resources |
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| Property | Value |
| CVE | CVE-2009-0021 |
| BID | |
Other resources |
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Debian Security Advisory (DSA-1702-1) http://lists.debian.org/debian-security-announce/2009/msg00009.html Red Hat Security Advisory (RHSA-2009:0046-7) https://rhn.redhat.com/errata/RHSA-2009-0046.html SUSE Security Advisory (SUSE-SR:2009:005) http://www.novell.com/linux/security/advisories/2009_5_sr.html SUSE Security Advisory (SUSE-SR:2009:008) http://www.novell.com/linux/security/advisories/2009_8_sr.html |
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Version history |
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| Version | Comments | Date |
| 1.0 | Aviso emitido | 2009-01-13 |
| 1.1 | Aviso emitido por Red Hat (RHSA-2009:0046-7) | 2009-02-04 |
| 1.2 | Aviso emitido por Suse (SUSE-SR:2009:005) | 2009-03-05 |
| 1.3 | Aviso emitido por Suse (SUSE-SR:2009:008) | 2009-04-07 |