8000 format-string vulnerability? · Issue #1035 · libevent/libevent · GitHub
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format-string vulnerability? #1035
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@frokaikan

Description

@frokaikan

May function
int evbuffer_add_printf(struct evbuffer *buf, const char *fmt, ...)
at buffer.c
cause a buffer-overflow?

int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
    char *s = malloc(size + 1);
    for (int i=0; i<size; ++i) s[i] = data[i];
    s[size] = '\0';
    struct evbuffer *buf = evbuffer_new();
    evbuffer_add_printf(buf, s);
    evbuffer_free(buf);
    free(s);
    return 0;
}

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