CVE-2000-1022 : Détail

CVE-2000-1022

4.36%V3
Network
2001-01-22
04h00 +00:00
2005-11-02
09h00 +00:00
Notifications pour un CVE
Restez informé de toutes modifications pour un CVE spécifique.
Gestion des notifications

Descriptions du CVE

The mailguard feature in Cisco Secure PIX Firewall 5.2(2) and earlier does not properly restrict access to SMTP commands, which allows remote attackers to execute restricted commands by sending a DATA command before sending the restricted commands.

Informations du CVE

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P nvd@nist.gov

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

Informations sur l'Exploit

Exploit Database EDB-ID : 20231

Date de publication : 2000-09-18 22h00 +00:00
Auteur : Lincoln Yeoh
EDB Vérifié : Yes

source: https://www.securityfocus.com/bid/1698/info Like other firewalls, the Cisco PIX Firewall implements technology that reads the contents of packets passing through it for application-level filtering. In the case of SMTP, it can be configured so only certain smtp commands can be allowed through (for example, dropping extra functionality, such as HELP or commands that could be a security concern, like EXPN or VRFY). When recieving messages, it allows all text through between "data" and "<CR><LF><CR><LF>.<CR><LF>", as this is where the body of the message would normally go and there could be words in it that are smtp commands which shouldn't be filtered. Due to the nature of SMTP and flaws in exceptional condition handling of PIX, it is reportedly possible to evade the smtp command restrictions by tricking the firewall into thinking the body of the message is being sent when it isn't. During communication with an smtp server, if the "data" command is sent before the more important information is sent, such as "rcpt to", the smtp server will return error 503, saying that rcpt was required. The firewall, however, thinks everything is alright and will let everything through until recieving "<CR><LF><CR><LF>.<CR><LF>". It is then possible for the attacker to do whatever he wishes on the email server. Here an example of what i could do exploiting this bug: helo ciao mail from: pinco@pallino.it data ( From here pix disable fixup) expn guest ( Now i could enumerate user vrfy oracle and have access to all command) help whatever command i want quit

Products Mentioned

Configuraton 0

Cisco>>Pix_firewall_software >> Version 4.2\(1\)

Cisco>>Pix_firewall_software >> Version 4.2\(2\)

Cisco>>Pix_firewall_software >> Version 4.2\(5\)

Cisco>>Pix_firewall_software >> Version 4.3

Cisco>>Pix_firewall_software >> Version 4.4\(4\)

Cisco>>Pix_firewall_software >> Version 5.0

Cisco>>Pix_firewall_software >> Version 5.1

Cisco>>Pix_firewall_software >> Version 5.2

Références

http://www.securityfocus.com/bid/1698
Tags : vdb-entry, x_refsource_BID