VAR-200808-0182

Vulnerability from variot - Updated: 2025-04-10 22:56

Stack-based buffer overflow in the WebexUCFObject ActiveX control in atucfobj.dll in Cisco WebEx Meeting Manager before 20.2008.2606.4919 allows remote attackers to execute arbitrary code via a long argument to the NewObject method. WebEx Meeting Manager is prone to a stack-based buffer-overflow vulnerability because it fails to perform adequate boundary checks on user-supplied input. This issue affects the 'atucfobj.dll' ActiveX control library. Failed attacks will likely cause denial-of-service conditions. 'atucfobj.dll' 20.2008.2601.4928 is vulnerable; other versions may also be affected. The vulnerable versions of the ActiveX control are hosted by WebEx meeting service servers running WBS 23, 25, and 26 prior to 26.49.9.2838. WebEx is Cisco's web conferencing solution. WebEx Meeting Manager versions earlier than 20.2008.2606.4919 have a stack overflow vulnerability. The WebexUCFObject control in Atucfobj.dll does not properly validate input parameters to the NewObject() method. ----------------------------------------------------------------------

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TITLE: Webex Meeting Manager WebexUCFObject ActiveX Control Buffer Overflow

SECUNIA ADVISORY ID: SA31397

VERIFY ADVISORY: http://secunia.com/advisories/31397/

CRITICAL: Highly critical

IMPACT: System access

WHERE:

From remote

SOFTWARE: WebEx Meeting Manager http://secunia.com/product/3003/

DESCRIPTION: Elazar Broad has discovered a vulnerability in Webex Meeting Manager, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the WebexUCFObject ActiveX control (atucfobj.dll) when handling arguments passed to the "NewObject()" method.

Successful exploitation allows execution of arbitrary code.

The vulnerability is confirmed in version 20.2008.2601.4928.

SOLUTION: The vendor has reportedly fixed the vulnerability in version 20.2008.2606.4919.

PROVIDED AND/OR DISCOVERED BY: Elazar Broad

ORIGINAL ADVISORY: http://lists.grok.org.uk/pipermail/full-disclosure/2008-August/063692.html

About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.

Subscribe: http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/

Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.

Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org

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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.