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Comment appliquer une mise à jour de sécurité à apache

J'ai effectué des tests d'intrusion sur notre serveur Web et quelques problèmes se sont posés. L’un d’eux est qu’Apache a besoin d’une mise à jour de sécurité ( http://www.ubuntu.com/usn/usn-1765-1/ ).

Je cours ubuntu 12.04 LTS et les instructions sur cette page suggèrent que courir

apt-get update

suivi par

apt-get upgrade

résoudra le problème, malheureusement on ne me dit pas qu’il n’ya pas de paquet à mettre à jour. J'ai essayé de télécharger l'archive à partir du lien, mais maintenant que j'ai décompressé, je ne sais pas trop quoi en faire.

La recherche sur Google semble bombarder d’instructions sur la façon d’installer Apache, mais si quelqu'un connaissait un guide, ce serait formidable. Tout conseil grandement apprécié.

Sortie de la politique apt-cache Apache2:

Apache2:
  Installed: 2.2.22-1ubuntu1.4
  Candidate: 2.2.22-1ubuntu1.4
  Version table:
 *** 2.2.22-1ubuntu1.4 0
        500 http://mirror.rackspace.com/ubuntu/ precise-updates/main AMD64 Packages
        500 http://mirror.rackspace.com/ubuntu/ precise-security/main AMD64 Packages
        100 /var/lib/dpkg/status
     2.2.22-1ubuntu1 0
        500 http://mirror.rackspace.com/ubuntu/ precise/main AMD64 Packages

Sortie de dpkg -l Apache *

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version        Description
+++-==============-==============-============================================
un  Apache         <none>         (no description available)
un  Apache-common  <none>         (no description available)
un  Apache-utils   <none>         (no description available)
ii  Apache2        2.2.22-1ubuntu Apache HTTP Server metapackage
un  Apache2-common <none>         (no description available)
un  Apache2-doc    <none>         (no description available)
un  Apache2-mpm    <none>         (no description available)
un  Apache2-mpm-ev <none>         (no description available)
un  Apache2-mpm-it <none>         (no description available)
ii  Apache2-mpm-pr 2.2.22-1ubuntu Apache HTTP Server - traditional non-threade
un  Apache2-mpm-wo <none>         (no description available)
un  Apache2-suexec <none>         (no description available)
un  Apache2-suexec <none>         (no description available)
ii  Apache2-utils  2.2.22-1ubuntu utility programs for webservers
ii  Apache2.2-bin  2.2.22-1ubuntu Apache HTTP Server common binary files
ii  Apache2.2-comm 2.2.22-1ubuntu Apache HTTP Server common files

Test de pénétration signalant le problème:

    Apache Partial HTTP Request Denial of Service Vulnerability - Zero Day  


QID:
    86847
Category:
    Web server
CVE ID:
    -
Vendor Reference
    -
Bugtraq ID:
    -
Service Modified:
    05/30/2013
User Modified:
    -
Edited:
    No
PCI Vuln:
    No

THREAT:
    The Apache HTTP Server, commonly referred to as Apache is a freely available Web server.

    Apache is vulnerable to a denial of service due to holding a connection open for partial HTTP requests.

    Apache Versions 1.x and 2.x are vulnerable.
IMPACT:
    A remote attacker can cause a denial of service against the Web server which would prevent legitimate users from accessing the site.

    Denial of service tools and scripts such as Slowloris takes advantage of this vulnerability.
SOLUTION:
    Patch -
    There are no vendor-supplied patches available at this time.

    Workaround:
    - Reverse proxies, load balancers and iptables can help to prevent this attack from occurring.

    - Adjusting the TimeOut Directive can also prevent this attack from occurring.

    - A new module mod_reqtimeout has been introduced since Apache 2.2.15 to provide tools for mitigation against these forms of attack.

    Also refer to Cert Blog and Slowloris and Mitigations for Apache document for further information.
COMPLIANCE:
    Not Applicable
EXPLOITABILITY:
    There is no exploitability information for this vulnerability.
ASSOCIATED MALWARE:
    There is no malware information for this vulnerability.
RESULTS:
    QID: 86847 detected on port 80 over TCP - Apache/2.2.22 (Ubuntu)


3
    Apache HTTP Server Prior to 2.2.23 Multiple Vulnerabilities     


QID:
    87133
Category:
    Web server
CVE ID:
    CVE-2012-2687 CVE-2012-0883 
Vendor Reference
    Apache
Bugtraq ID:
    53046, 55131
Service Modified:
    01/02/2013
User Modified:
    -
Edited:
    No
PCI Vuln:
    Yes

THREAT:
    Apache HTTP Server is an HTTP web server application.

    Apache server prior to version 2.2.23 is affected by multiple issues:

    Insecure LD_LIBRARY_PATH handling

    Cross-site scripting in mod_negotiation when untrusted uploads are supported Affected Versions:
    Apache HTTP Server prior to version 2.2.23
IMPACT:
    Successful exploitation may lead to execution of arbitrary code on the system within the context of the affected applications.

SOLUTION:
    These vulnerabilities have been patched in Apache 2.2.23. Refer to Apache httpd 2.2 Security Vulnerabilities.

    Patch:
    Following are links for downloading patches to fix the vulnerabilities:

    Apache 2.2.23 (Apache HTTP Server)
COMPLIANCE:
    Not Applicable
EXPLOITABILITY:
    There is no exploitability information for this vulnerability.
ASSOCIATED MALWARE:
    There is no malware information for this vulnerability.
RESULTS:
    QID 87133 detected on port 80 - Apache/2.2.22 (Ubuntu)


3
    Apache Prior to 2.4.4 and 2.2.24 Multiple Vulnerabilities   port 80/tcp


QID:
    87156
Category:
    Web server
CVE ID:
    CVE-2012-3499 CVE-2012-4558 
Vendor Reference
    Apache httpd 2.2 Vulnerabilities, Apache httpd 2.4 Vulnerabilities
Bugtraq ID:
    58165
Service Modified:
    05/22/2013
User Modified:
    -
Edited:
    No
PCI Vuln:
    Yes

THREAT:
    Apache HTTP Server is an HTTP web server application.

    Apache HTTP Server is prone to multiple cross-site scripting vulnerabilities because it fails to properly sanitize user-supplied input.

    - Various XSS flaws exist due to unescaped hostnames and URIs HTML output in mod_info, mod_status, mod_imagemap, mod_ldap, and mod_proxy_ftp.

    - A XSS flaw affects the mod_proxy_balancer manager interface.

    Affected Versions:
    Apache HTTP Server prior to 2.4.4
    Apache HTTP Server prior to 2.2.24
IMPACT:
    An attacker may leverage these issues to execute arbitrary HTML and script code in the browser of an unsuspecting user in the context of the affected site. This may let the attacker launch additional attacks. 
SOLUTION:
    These vulnerabilities have been patched in Apache 2.2.24 and 2.4.4. Refer to Apache httpd 2.4.4 Changelog and Apache httpd 2.2.24 Changelog.

    Ubuntu users refer to Ubuntu advisory USN-1765-1 for affected packages and patching details, or update with your package manager.

    Patch:
    Following are links for downloading patches to fix the vulnerabilities:

    Apache 2.2.24 (Apache HTTP Server 2.2.24)

    Apache 2.4.4 (Apache HTTP Server 2.4.4)
COMPLIANCE:
    Not Applicable
EXPLOITABILITY:
    There is no exploitability information for this vulnerability.
ASSOCIATED MALWARE:
    There is no malware information for this vulnerability.
RESULTS:
    QID 87156 detected on port 80 - Apache/2.2.22 (Ubuntu)


3
    Apache HTTP Server Prior to 2.2.25 Multiple Vulnerabilities     port 80/tcp


QID:
    87233
Category:
    Web server
CVE ID:
    CVE-2013-1896 CVE-2013-1862 
Vendor Reference
    Apache 2.2.25
Bugtraq ID:
    -
Service Modified:
    07/15/2013
User Modified:
    -
Edited:
    No
PCI Vuln:
    Yes

THREAT:
    Apache HTTP Server is an HTTP web server application.

    Apache HTTP Server versons before to 2.2.25 are exposed to following vulnerabilities: mod_rewrite.c in the mod_rewrite module in the Apache HTTP Server 2.2.x before 2.2.25 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to execute arbitrary commands via an HTTP request containing an escape sequence for a terminal emulator (CVE-2013-1862).
    mod_dav.c in the Apache HTTP Server versions before 2.2.25 do not properly determine whether DAV is enabled for a URI, which allows remote attackers to cause a denial of service (segmentation fault) via a MERGE request in which the URI is configured for handling by the mod_dav_svn module, but a certain href attribute in XML data refers to a non-DAV URI (CVE-2013-1896).
IMPACT:
    Successfully exploiting these vulnerabilities might allow a remote attacker to execute code or cause denial of service.
SOLUTION:
    These vulnerabilities have been patched in Apache 2.2.25. Refer to Apache httpd 2.2.25 Changelog.

    Patch:
    Following are links for downloading patches to fix the vulnerabilities:

    Apache 2.2.25
COMPLIANCE:
    Not Applicable
EXPLOITABILITY:
    There is no exploitability information for this vulnerability.
ASSOCIATED MALWARE:
    There is no malware information for this vulnerability.
RESULTS:
    QID 87233 detected on port 80 - Apache/2.2.22 (Ubuntu)
12.04apache2webserver
2
SwiftD

Essaye ça

Sudo -i

gedit /etc/apt/sources.list

ajouter la ligne

deb http://us.archive.ubuntu.com/ubuntu/ precise main

Sauvegarder et quitter, puis faire

Sudo apt-get update
Sudo apt-get install Apache2
Apache2 -v

Puis éditez à nouveau /etc/apt/sources.list et commentez ou supprimez complètement la ligne suivante

#deb http://us.archive.ubuntu.com/ubuntu/ precise main

Sudo apt-get update

3
Mitch