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seebugRootSSV:3241
HistoryApr 30, 2008 - 12:00 a.m.

BitDefender Antivirus无效SSDT参数本地拒绝服务漏洞

2008-04-3000:00:00
Root
www.seebug.org
14

0.0004 Low

EPSS

Percentile

5.1%

BUGTRAQ ID: 28741
CVE(CAN) ID: CVE-2008-1735

BitDefender Antivirus 2008是具有功能强大的反病毒引擎以及互联网过滤技术的杀毒软件。

BitDefender没有正确地验证提供给NtOpenProcess的CLIENT_ID结构指针,如果传送了无效指针的话,就会导致整个系统崩溃。

/-----------

NtOpenProcess(PHANDLE ProcessHandle,
ACCESS_MASK AccessMask,
POBJECT_ATTRIBUTES ObjectAttributes,
PCLIENT_ID ClientId )

.text:00010ADE push 0Ch
.text:00010AE0 push offset stru_114E8
.text:00010AE5 call __SEH_prolog
.text:00010AEA call KeGetCurrentThread
.text:00010AEF xor ebx, ebx
.text:00010AF1 cmp [eax+140h], bl
.text:00010AF7 jz short loc_10B0D
.text:00010AF9 call PsGetCurrentProcessId
.text:00010AFE call PsGetCurrentProcessId
.text:00010B03 push eax
.text:00010B04 call sub_10724
.text:00010B09 test eax, eax
.text:00010B0B jnz short loc_10B12
.text:00010B0D
.text:00010B0D loc_10B0D: ; CODE XREF: sub_10ADE+19_j
.text:00010B0D push [ebp+ClientId]
.text:00010B10 jmp short loc_10B73

.text:00010B12
.text:00010B12 loc_10B12: ; CODE XREF: sub_10ADE+2D_j
.text:00010B12 mov edi, [ebp+ClientId]
.text:00010B15 cmp edi, ebx ; Little check to avoid a
Null Pointer

  • -----------/

这里得到了ClientId值的指针,如果非0的话就会忽略其指向。

/-----------

.text:00010B17 jnz short loc_10B1C
.text:00010B19 push ebx
.text:00010B1A jmp short loc_10B73

.text:00010B1C
.text:00010B1C loc_10B1C: ; CODE XREF: sub_10ADE+39_j
.text:00010B1C mov [ebp+ms_exc.disabled], ebx
.text:00010B1F mov esi, [edi] ; Here it crashes

  • -----------/

如果所访问内存无效的话系统就会崩溃。

/-----------

.text:00010B21 mov [ebp+var_1C], esi
.text:00010B24 or [ebp+ms_exc.disabled], 0FFFFFFFFh
.text:00010B28 jmp short loc_10B3B
.text:00010B28 sub_10ADE endp

  • -----------/

Softwin BitDefender Antivirus 2008
Softwin

目前厂商已经发布了升级补丁以修复这个安全问题,请到厂商的主页下载:

<a href=“http://www.bitdefender.com/” target=“_blank”>http://www.bitdefender.com/</a>

0.0004 Low

EPSS

Percentile

5.1%