CVE-2015-2523 : Détail

CVE-2015-2523

Overflow
68.43%V4
Network
2015-09-08
22h00 +00:00
2018-10-12
17h57 +00:00
CVE.org
NVD
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Descriptions du CVE

Microsoft Excel 2007 SP3, Excel 2010 SP2, Excel 2013 SP1, Excel 2013 RT SP1, Excel for Mac 2011 and 2016, Office Compatibility Pack SP3, and Excel Viewer allow remote attackers to execute arbitrary code via a crafted Office document, aka "Microsoft Office Memory Corruption Vulnerability."

Informations du CVE

Faiblesses connexes

CWE-ID Nom de la faiblesse 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.

Métriques

Métriques Score Gravité CVSS Vecteur Source
V2 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C nvd@nist.gov

EPSS

EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.

Score EPSS

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Percentile EPSS

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
EPSS First.org

Informations sur l'Exploit

Exploit Database EDB-ID : 38214

Date de publication : 2015-09-15 22h00 +00:00
Auteur : Google Security Research
EDB Vérifié : Yes

Source: https://code.google.com/p/google-security-research/issues/detail?id=462 The following crash was observed in Microsoft Excel 2007 running on Windows 2003 R2. This crash was also reproduced in Microsoft Excel 2010 on Windows 7 x86 and Microsoft Excel 2013 on Windows 8.1 x86. The test environment was Excel 2007 on Windows 2003 R2 with application verifier basic checks enabled. Attached files: Original File: 683709058_orig.xls Crashing File: 683709058_crash.xls Minimized Crashing File: 683709058_min.xls The minimized crashing file shows two deltas from the original. The first at offset 0x237 is in the data of the 4th BIFFRecord and the second delta at offset 0x34a5 is in the type field of a BIFFRecord. File versions: Excel.exe: 12.0.6718.5000 MSO.dll: 12.0.6721.5000 Observed Crash: eax=00000000 ebx=00000000 ecx=0ce119f8 edx=00003fff esi=0e98de10 edi=0013c82c eip=30037cc5 esp=00137180 ebp=00137188 iopl=0 nv up ei pl nz na po nc cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010202 *** ERROR: Symbol file could not be found. Defaulted to export symbols for Excel.exe - Excel!Ordinal40+0x37cc5: 30037cc5 0fb64604 movzx eax,byte ptr [esi+4] ds:0023:0e98de14=?? 0:000> kb L8 ChildEBP RetAddr Args to Child WARNING: Stack unwind information not available. Following frames may be wrong. 00137188 303df098 0e98de10 00000000 00000102 Excel!Ordinal40+0x37cc5 0013d068 30528190 0013d0a8 00000102 00000000 Excel!Ordinal40+0x3df098 0013d2bc 305280b1 00000000 00000001 00000008 Excel!Ordinal40+0x528190 0013d330 3038d46d 0013ddf2 00000000 00000001 Excel!Ordinal40+0x5280b1 0013e000 300084a4 0013e104 00000001 0013f568 Excel!Ordinal40+0x38d46d 0013fbb0 30005e9a 02270fd7 00000003 30f61708 Excel!Ordinal40+0x84a4 0013feb8 30003b3a 00000000 02270fd7 00000003 Excel!Ordinal40+0x5e9a 0013ff30 30003884 30000000 00000000 02270fd7 Excel!Ordinal40+0x3b3a In this crash esi is a heap address. We can see that this is a free chunk: 0:000> !heap -p -a 0xe98de10 address 0e98de10 found in _DPH_HEAP_ROOT @ 1161000 in free-ed allocation ( DPH_HEAP_BLOCK: VirtAddr VirtSize) e7f0fc0: e98d000 2000 7c83e330 ntdll!RtlFreeHeap+0x0000011a 018b1611 vfbasics!AVrfpRtlFreeHeap+0x000000a8 331039d5 mso!Ordinal1743+0x00002d4d 329c91d1 mso!MsoFreePv+0x0000003f 30298310 Excel!Ordinal40+0x00298310 30300ac3 Excel!Ordinal40+0x00300ac3 305f1899 Excel!Ordinal40+0x005f1899 This is a use after free vulnerability affecting all currently supported versions of Microsoft Excel. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/38214.zip

Products Mentioned

Configuraton 0

Microsoft>>Excel >> Version 2007

Microsoft>>Excel >> Version 2010

Microsoft>>Excel >> Version 2010

Microsoft>>Excel >> Version 2011

    Microsoft>>Excel >> Version 2013

    Microsoft>>Excel >> Version 2013

    Microsoft>>Excel >> Version 2016

      Microsoft>>Excel_viewer >> Version *

      Microsoft>>Office_compatibility_pack >> Version *

      Références

      http://www.securitytracker.com/id/1033488
      Tags : vdb-entry, x_refsource_SECTRACK
      https://www.exploit-db.com/exploits/38214/
      Tags : exploit, x_refsource_EXPLOIT-DB