CVE-2017-1130

published 2017-09-05

CVE-2017-1130: IBM Notes 8.5 and 9.0 is vulnerable to a denial of service. If a user is persuaded to click on a malicious link, it would open up many file select dialog boxes…

Priority P3 44 medium 6.5 CVSS 3.0

AV N AC L PR N UI R S U C N I N A H

EXPLOIT

IBM Notes 8.5 and 9.0 is vulnerable to a denial of service. If a user is persuaded to click on a malicious link, it would open up many file select dialog boxes which would cause the client hang and have to be restarted. IBM X-Force ID: 121371.

Affected

19 ranges

Vendor	Product	Version range	Fixed in
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ibm	notes	—	—
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ibm	notes	—	—
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ibm	notes	—	—

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

url data:text/html,f.click();setInterval("f.click()", 1);↗

• → Detect repeated programmatic invocation of file select dialog (f.click()) via setInterval with a 1ms interval, which is characteristic of this DoS exploit triggering the IBM Notes native browser to hang. ↗
• → Monitor for spawning of multiple child windows via window.open() using data: URIs containing JavaScript that recursively calls f.click(), as used in the PoC to amplify the DoS effect. ↗
• → The exploit checks window.status === undefined to detect when a file dialog is displayed, then closes and reopens windows in a loop. Anomalous rapid open/close of browser windows in IBM Notes client context is an indicator. ↗
• → A Metasploit auxiliary module exists for this DoS; detect exploitation attempts by monitoring for HTTP responses serving the PoC JavaScript payload to IBM Notes browser clients. ↗

• · The DoS is triggered only when a user clicks a malicious link inside the IBM Notes native browser; it does not self-propagate and requires social engineering. ↗
• · Affected versions are IBM Notes 8.5 and 9.0 only; patched versions are documented in IBM Security Bulletin swg21999384. ↗

CVSS provenance

nvd v3.0 6.5 MEDIUM CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd v2.0 4.3 MEDIUM AV:N/AC:M/Au:N/C:N/I:N/A:P

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