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10.0

Opera browser may execute malicious code via large files

CVE-2010-1349 · published 16 years ago
Summary

Versions 10.10 through 10.50 of the Opera web browser can be tricked by a web page that sends an unusually large Content‑Length header. This causes the browser to overflow its memory, potentially allowing an attacker to run their own code on the user's computer. Upgrade to a newer version of Opera or apply any available patches to fix the issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
opera opera_browser 10.10
10.50
cpe:2.3:a:opera:opera_browser:10.10:*:*:*:*:*:*:*
Original advisory text
Integer overflow in Opera 10.10 through 10.50 allows remote attackers to execute arbitrary code via a large Content-Length value, which triggers a heap overflow.
Integer overflow in Opera 10.10 through 10.50 allows remote attackers to execute arbitrary code via a large Content-Length value, which triggers a heap overflow.
References
Fix within
Internet-facing 3 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker full control (estimated)
Severity
10.0 Critical
Exploitation
20% chance of attack within 30 days
Type
CWE-189Numeric Errors
Timeline
Published12 Apr 2010
Updated29 Sep 2026
First seen29 Sep 2026
Sources
CVE-2010-1349 · NVD
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