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A bug-tracking system such as Bugzilla contains bug reports (BRs) collected from various sources such as development teams, testing teams, and end users. When bug reporters submit bug reports to a bug-tracking system, the bug reporters need to label the bug reports as security bug reports (SBRs) or not, to indicate whether the involved bugs are security problems. These SBRs generally deserve higher priority in bug fixing than not-security bug reports (NSBRs). However, in the bug-reporting process, bug reporters often mislabel SBRs as NSBRs partly due to lack of security domain knowledge. This mislabeling could cause serious damage to software-system stakeholders due to the induced delay of identifying and fixing the involved security bugs. To address this important issue, we developed a new approach that applies text mining on natural-language descriptions of BRs to train a statistical model on already manually-labeled BRs to identify SBRs that are manually-mislabeled as NSBRs. Security engineers can use the model to automate the classification of BRs from large bug databases to reduce the time that they spend on searching for SBRs. We evaluated the model's predictions on a large Cisco software system with over ten million source lines of code. Among a sample of BRs that Cisco bug reporters manually labeled as NSBRs in bug reporting, our model successfully classified a high percentage (78%) of the SBRs as verified by Cisco security engineers, and predicted their classification as SBRs with a probability of at least 0.98.
Gegick et al. (Sat,) studied this question.
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