Mitigate Baron SameEdit (CVE-2021-3156) vulnerability

sles 15.2
buffer weakness #63

5

Weakness Breakdown


Definition:

Buffer overflows are one of the most well-known software vulnerabilities. Even though most developers know what buffer overflows are, attacks against the vulnerabilities are common in both legacy and newer applications. A classic buffer overflow exploit begins with the attacker sending data to a program, which it then stores in an undersized stack buffer. Besides stack buffer overflows, other kinds of buffer overflows include heap overflows, off-by-one errors and many others. Learn more about buffer overflows on OWASP attack index.

Warning code(s):

Does not check for buffer overflows.

File Name:

webkitgtk-2.28.2/Source/JavaScriptCore/bytecode/RecordedStatuses.h

Context:

The highlighted line of code below is the trigger point of this particular Sles 15.2 buffer weakness.

     
    CallLinkStatus* addCallLinkStatus(const CodeOrigin&, const CallLinkStatus&);
    GetByStatus* addGetByStatus(const CodeOrigin&, const GetByStatus&);
    PutByIdStatus* addPutByIdStatus(const CodeOrigin&, const PutByIdStatus&);
    InByIdStatus* addInByIdStatus(const CodeOrigin&, const InByIdStatus&);
    
    void visitAggregate(SlotVisitor&);
    void markIfCheap(SlotVisitor&);
    
    void finalizeWithoutDeleting(VM&);
    void finalize(VM&);
    
    void shrinkToFit();
    
    template<typename Func>
    void forEachVector(const Func& func)
    {
        func(calls);
        func(gets);
        func(puts);
        func(ins);
    }
    
    Vector<std::pair<CodeOrigin, std::unique_ptr<CallLinkStatus>>> calls;
    Vector<std::pair<CodeOrigin, std::unique_ptr<GetByStatus>>> gets;
    Vector<std::pair<CodeOrigin, std::unique_ptr<PutByIdStatus>>> puts;
    Vector<std::pair<CodeOrigin, std::unique_ptr<InByIdStatus>>> ins;
};

} // namespace JSC
 

The registered trademark Linux® is used pursuant to a sublicense from the Linux Foundation, the exclusive licensee of Linus Torvalds, owner of the mark on a world­wide basis.