Critical · published June 12, 2018
💡 An integer overflow sneaks in when the Expat library parses XML data in Firefox versions below 50. It’s like letting your car's fuel gauge read way past full—dangerously misleading! Think of it as reading a recipe where the ingredient amounts don’t add up. If you accidentally interpret one number too high, suddenly you're adding way too much salt! That's what happens here when the parsing goes awry and outputs unexpected values. This oversight could lead to unexpected behavior in the browser, potentially crashing the application or allowing for malformed data processing. While this may not be a direct attack vector, the implications of misparse can still lead to some chaotic scenarios for users.
Think of it as reading a recipe where the ingredient amounts don’t add up. If you accidentally interpret one number too high, suddenly you're adding way too much salt! That's what happens here when the parsing goes awry and outputs unexpected values. The vulnerability manifests as an integer overflow during XML parsing in the Expat library, affecting versions of Firefox prior to 50. This flaw allows for unexpected data handling, resulting in possible instability.
This oversight could lead to unexpected behavior in the browser, potentially crashing the application or allowing for malformed data processing. While this may not be a direct attack vector, the implications of misparse can still lead to some chaotic scenarios for users. Make sure to update Firefox to version 50 or above to eliminate this vulnerability. If you’re using Expat directly, check for any patches or updates related to integer overflow handling. You've got this! By updating, you're taking a solid step towards a more secure browsing experience. 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| mozilla/firefox | < 50 | 50 |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| python/python | ≥ 2.7.0, < 2.7.15 | 2.7.15 |
| python/python | ≥ 3.3.0, < 3.3.7 | 3.3.7 |
| python/python | ≥ 3.4.0, < 3.4.7 | 3.4.7 |
| python/python | ≥ 3.5.0, < 3.5.4 | 3.5.4 |
| python/python | ≥ 3.6.0, < 3.6.2 | 3.6.2 |