CVE-2005-0555

published 2005-04-12

CVE-2005-0555: Buffer overflow in the Content Advisor in Microsoft Internet Explorer 5.01, 5.5, and 6 allows remote attackers to execute arbitrary code via a crafted Content…

Priority P3 43 high 7.5 CVSS 2.0

AV N AC L Au N C P I P A P

EXPLOIT

Buffer overflow in the Content Advisor in Microsoft Internet Explorer 5.01, 5.5, and 6 allows remote attackers to execute arbitrary code via a crafted Content Advisor file, aka "Content Advisor Memory Corruption Vulnerability."

Affected

3 ranges

Vendor	Product	Version range	Fixed in
microsoft	internet_explorer	—	—
microsoft	internet_explorer	—	—
microsoft	internet_explorer	—	—

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

filename rsaci.rat↗

port 9999↗

command FFD4 (CALL ESP)↗

process msrating.dll↗

bytes↗

EB 03 5D EB 05 E8 F8 FF FF FF 8B C5 83 C0 11 33

• → Malicious Content Advisor .rat file contains a PICS-version header with an oversized 'name' field (~1500 bytes of padding/shellcode) — detect .rat files where the 'name' field exceeds normal length bounds. ↗
• → Shellcode is placed at offset 500 within the name field buffer, preceded by a short JMP (\x90\xeb\xFF\x90) at offset 280 and a 4-byte return address at offset 284 — scan .rat files for NOP sleds followed by shellcode patterns in the name field. ↗
• → Successful exploitation results in EIP overwritten with 0x41414141 (crash case) or a CALL ESP gadget in wininet.dll — monitor for access violations in msrating.dll with EIP pointing into the stack or at known wininet.dll gadget addresses. ↗
• → Attack can be delivered via a malicious website or HTML email through Outlook/Outlook Express — monitor for .rat file downloads or email attachments with PICS-version content. ↗

• · Exploitation requires user interaction — the victim must follow steps to install/open the malicious .rat file (double-click), limiting drive-by exploitation. ↗
• · The provided return addresses (CALL ESP / JMP ESP gadgets in wininet.dll) are version- and SP-specific to Spanish Windows 2000 builds; offsets will differ on other locales/service packs and must be re-derived. ↗

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