CERTA-2003-AVI-131

Vulnerability from certfr_avis - Published: - Updated:

Une vulnérabilité sur les gardes-barrières et VPN NetScreen permet à un utilisateur mal intentionné, via un paquet malicieusement construit, de réaliser un déni de service du garde barrière.

Description

Il est possible d'administrer les gardes-barrières NetScreen par différentes méthodes : telnet, WebAuth (http / https), ssh, ou ProxyAuth.

Un utilisateur mal intentionné non privilègié peut, en utilisant les protocoles telnet, http ou https, réaliser un déni de service du garde-barrière par l'envoi, d'un paquet malicieusement construit adressé à celui-ci.

Contournement provisoire

  • Activer la caractéristique « anti-spoofing » sur le garde barrière.
  • Utiliser le protocole ssh plutôt que le protocole telnet.
  • Utiliser l'authentification par ProxyAuth.

Solution

Appliquer les correctifs correspondant à votre version (cf. section documentation).

Les gardes barrières et VPN NetScreen sous ScreenOS

  • versions 4.0.1r1 à 4.0.1r6 ;
  • version 4.0.3r1 ;
  • version 4.0.3r2.

Impacted products
Vendor Product Description
References

Show details on source website

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [],
  "affected_systems_content": "\u003cp\u003eLes gardes barri\u00e8res et VPN NetScreen  sous ScreenOS  \u003cUL\u003e    \u003cLI\u003eversions 4.0.1r1 \u00e0 4.0.1r6 ;\u003c/LI\u003e    \u003cLI\u003eversion 4.0.3r1 ;\u003c/LI\u003e    \u003cLI\u003eversion 4.0.3r2.\u003c/LI\u003e  \u003c/UL\u003e\u003c/p\u003e",
  "content": "## Description\n\nIl est possible d\u0027administrer les gardes-barri\u00e8res NetScreen par\ndiff\u00e9rentes m\u00e9thodes : telnet, WebAuth (http / https), ssh, ou\nProxyAuth.\n\nUn utilisateur mal intentionn\u00e9 non privil\u00e8gi\u00e9 peut, en utilisant les\nprotocoles telnet, http ou https, r\u00e9aliser un d\u00e9ni de service du\ngarde-barri\u00e8re par l\u0027envoi, d\u0027un paquet malicieusement construit adress\u00e9\n\u00e0 celui-ci.\n\n## Contournement provisoire\n\n-   Activer la caract\u00e9ristique \u00ab anti-spoofing \u00bb sur le garde barri\u00e8re.\n-   Utiliser le protocole ssh plut\u00f4t que le protocole telnet.\n-   Utiliser l\u0027authentification par ProxyAuth.\n\n## Solution\n\nAppliquer les correctifs correspondant \u00e0 votre version (cf. section\ndocumentation).\n",
  "cves": [],
  "links": [
    {
      "title": "Correctif de NetScreen :",
      "url": "http://www.netscreen.com/services/download_soft/"
    }
  ],
  "reference": "CERTA-2003-AVI-131",
  "revisions": [
    {
      "description": "version initiale.",
      "revision_date": "2003-08-01T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service"
    }
  ],
  "summary": "Une vuln\u00e9rabilit\u00e9 sur les gardes-barri\u00e8res et VPN NetScreen permet \u00e0 un\nutilisateur mal intentionn\u00e9, via un paquet malicieusement construit, de\nr\u00e9aliser un d\u00e9ni de service du garde barri\u00e8re.\n",
  "title": "Vuln\u00e9rabilit\u00e9 sur les gardes-barri\u00e8res NetScreen",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Avis de s\u00e9curit\u00e9 57739 de NetScreen",
      "url": "http://www.netscreen.com/services/security/alerts/advisory-57739.txt"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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