ID

VAR-200212-0654

CVE

CVE-2002-1367

TITLE

CUPS Vulnerabilities that allow adding printers without authentication

DESCRIPTION

Common Unix Printing System (CUPS) 1.1.14 through 1.1.17 allows remote attackers to add printers without authentication via a certain UDP packet, which can then be used to perform unauthorized activities such as stealing the local root certificate for the administration server via a "need authorization" page, as demonstrated by new-coke. ------------ This vulnerability information is a summary of multiple vulnerabilities released at the same time. Please note that the contents of vulnerability information other than the title are included. ------------ Common Unix Printing System (CUPS) Some UNIX Included in the UNIX Can be used universally in the environment Internet Printing Protocol version 1.1 (IPP/1.1) Is a printing system that supports Red Hat Linux 7.3 as well as 8.0 It is also bundled with. this CUPS Has the following security issues: still, Red Hat Linux Then CUPS Is disabled in the default installation. 1. Overflow due to overflow of integer digits * [CAN-2002-1383] CUPS There are a few problems with overflowing integer digits. For example, HTTP By exploiting this issue through the interface, a remote attacker can CUPSd Execute permission ( A user lp) Can execute arbitrary code. 2. Resource race condition for temporary file generation processing (race condition) Problem * [CAN-2002-1366] CUPS Is /etc/cups/certs/ less than pid ( Generation time CUPS Process ID) Creates a temporary file with a file name of, so a local attacker can predict how the temporary file name is determined. Therefore, by creating a file with the same name as the temporary file that points to the intended file, root Any file can be overwritten or created with authority. In order to execute this attack, 1. In advance, lp User rights are required. 3. Printer addition mechanism / Problems with the access control function * [CAN-2002-1367] Malicious maliciously created remotely UDP Packet CUPS By sending to, you can bypass the authentication and add a printer. Furthermore, there is a problem that the access control mechanism of the printer addition mechanism neglects the validity check. The added printer information is root Since it is interpreted by the authority, any print can be added by using these problems together. As a result, local attackers root Elevation to privilege is possible. 4. Intentionally created HTTP By communication CUPSd That crashes [CAN-2002-1368] CUPS Then IPP To accept connections on the backend HTTP server (CUPSd) Is included. this HTTP Server HTTP The remote attacker is not able to verify the validity of the range of received values in the handling part of Contents-Length: The field was set to a negative value, or intentionally assembled and chunked HTTP By trying to communicate with the protocol, CUPS Can be put into a denial of service. To restore normal operation CUPSd Needs to be restarted. 5. strncat Problem of buffer overflow caused by function [CAN-2002-1369] CUPS Has a buffer overflow problem when receiving a printer job with a specific attribute value. By using this issue, a remote attacker can root It is possible to execute arbitrary code with authority. To take advantage of this issue, 3. Need to take advantage of the problem. 6.GIF Problems when handling file formats [CAN-2002-1371] CUPS In GIF Width in the part that handles format files (width) There is a problem with the process of validating the value of. For this reason, remote attackers are deliberately assembled (width) But '0' Is GIF Overwrite the allocated memory contents by interpreting the format file, CUPS An arbitrary code may be executed with the execution right. 7. File descriptor issues with sockets and files * [CAN-2002-1372] CUPS Has a problem that does not properly close file descriptors for sockets and files. For this reason, local attackers can use this issue to cause memory leaks, CUPS It is possible to put the entire system running in a service out of service state.Please refer to the “Overview” for the impact of this vulnerability. CUPS is prone to a vulnerability which may allow attackers to add printers. It has been reported that an attacker may send a specially crafted UDP packet to the CUPS server which will cause a printer to be temporarily added and configured to listen on a high port. This certificate may be used to authenticate to the web administrative interface, where it is possible to create a printer with root privileges. Successful exploitation may provide an attacker with means to exploit other known issues in CUPS. The system is based on the Internet Printing Protocol (IPP) and provides most PostScript and raster printer services. There is a design problem in CUPS. Then it will return to the \"need authorization\" page. After receiving the certificate, the client can add a printer, and execute arbitrary commands with root user privileges combined with other CUPS vulnerabilities

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

Design Error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

iDEFENSE Labs※ labs@idefense.com

SOURCES

LAST UPDATE DATE

2024-08-14T13:51:24.086000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE