ID

VAR-200212-0649

CVE

CVE-2002-1383

TITLE

CUPS Multiple integer overflow vulnerabilities

DESCRIPTION

Multiple integer overflows in Common Unix Printing System (CUPS) 1.1.14 through 1.1.17 allow remote attackers to execute arbitrary code via (1) the CUPSd HTTP interface, as demonstrated by vanilla-coke, and (2) the image handling code in CUPS filters, as demonstrated by mksun. ------------ 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. 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. Successful attacks may grant local access to adversaries with user 'lp' and group 'sys' privileges. It is significantly easier for attackers to obtain superuser privileges once local access has been obtained. Depending on system configuration, other privileges may be gained. The system is based on the Internet Printing Protocol (IPP) and provides most PostScript and raster printer services. The http component contains the cgi-bin/var.c file, which has the following variables: var = form_vars + form_count; var->name = strdup(name); var->nvalues ​​= element + 1; var->avalues ​​= element + 1 ; var->values ​​= calloc(element + 1, sizeof(char *)); var->values[element] = strdup(value); Since the attacker can control the element and value, the stack address of the calling function can be overwritten instead execute arbitrary commands

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

Boundary Condition Error

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Discovered by zen-parse.

SOURCES

LAST UPDATE DATE

2024-11-22T22:48:43.997000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE