Published:
14 November 2002
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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.633 -- KDE Security Advisory rlogin.protocol and telnet.protocol URL KIO Vulnerability 14 November 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: KIO Subsystem Vendor: KDE Impact: Execute Arbitrary Code/Commands Access Required: Remote Comment: The PGP signature on the original advisory could not be verified, however the original document can be found at http://www.kde.org/info/security/advisory-20021111-1.txt - --------------------------BEGIN INCLUDED TEXT-------------------- KDE Security Advisory: rlogin.protocol and telnet.protocol URL KIO Vulnerability Original Release Date: 2002-11-11 URL: http://www.kde.org/info/security/advisory-20021111-1.txt 0. References None. 1. Systems affected: All KDE 2 releases starting with KDE 2.1 and all KDE 3 releases (up to 3.0.4 and 3.1rc3). 2. Overview: KDE provides support for various network protocols via the KIO subsystem. These protocols are implemented with text files containing the extension .protocol, normally stored in the shared/services/ subdirectory under the KDE installation root. The implementation of the rlogin protocol in all of the affected systems, and the implementation of the telnet protocol in affected KDE 2 systems, allows a carefully crafted URL in an HTML page, HTML email or other KIO-enabled application to execute arbitrary commands on the system using the victim's account on the vulnerable machine. 3. Impact: The vulnerability potentially enables local or remote attackers to compromise a victim's account and execute arbitrary commands on the local system with the victim's privileges, such as erasing files, accessing data or installing trojans. 4. Solution: The vulnerability has been fixed in KDE 3.0.5 and a patch is available for KDE 3.0.4. For affected KDE 3 systems, we recommend upgrading to KDE 3.0.5, applying the patch provided or disabling the rlogin protocol. For affected KDE 2 systems, we recommend disabling both the rlogin and telnet KIO protocols. The rlogin protocol vulnerability can be disabled by deleting any rlogin.protocol files on the system and restarting the active KDE sessions. The file is usually installed in [kdeprefix]/share/services/rlogin.protocol ([kdeprefix] is typically /opt/kde3 or /usr), but copies may exist elsewhere, such as in users' [kdehome]/share/services directory ([kdehome] is typically the .kde directory in a user's home directory). The telnet protocol vulnerability can be similary disabled in affected KDE 2 systems. kdelibs-3.0.5 can be downloaded from http://download.kde.org/stable/3.0.5/src/kdelibs-3.0.5.tar.bz2 : ff22bd58b91ac34e476c308d345421aa kdelibs-3.0.5.tar.bz2 Some vendors are building binary packages of kdelibs-3.0.5. Please check your vendors website and the KDE 3.0.5 information page (http://ww.kde.org/info/3.0.5.html) periodically for availability. 5. Patch: Patches are available for KDE 3.0.x from the KDE FTP server (ftp://ftp.kde.org/pub/kde/security_patches/): 5625501819f09510d542142aea7b85ab post-3.0.4-kdelibs-kio-misc.diff - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBPdONmyh9+71yA2DNAQFWdwP/e0j5EAJM8uOj2j/t52tQJLxYG6Nz98dN LakcWULeHPfGCDoGoqbULELMQoYxacdTceshRiLnzWVshxKNjFwSftZq43nOZpco mWBtdezZIdFosqXf+9D/wB1+htvWW9AogSBsuECoHfX1t1A72vWGmsRP9EwxsRXx 6ZYl66GSaC0= =g5O5 -----END PGP SIGNATURE-----