static int AppLayerProtoDetectTest16(void)
{
    int result = 0;
    Flow *f = NULL;
    HtpState *http_state = NULL;
    uint8_t http_buf1[] = "POST /one HTTP/1.0\r\n"
        "User-Agent: Mozilla/1.0\r\n"
        "Cookie: hellocatch\r\n\r\n";
    uint32_t http_buf1_len = sizeof(http_buf1) - 1;
    TcpSession ssn;
    Packet *p = NULL;
    Signature *s = NULL;
    ThreadVars tv;
    DetectEngineThreadCtx *det_ctx = NULL;
    DetectEngineCtx *de_ctx = NULL;
    AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc();

    memset(&tv, 0, sizeof(ThreadVars));
    memset(&ssn, 0, sizeof(TcpSession));

    p = UTHBuildPacket(NULL, 0, IPPROTO_TCP);
    if (p == NULL) {
        printf("packet setup failed: ");
        goto end;
    }

    f = UTHBuildFlow(AF_INET, "1.1.1.1", "2.2.2.2", 1024, 80);
    if (f == NULL) {
        printf("flow setup failed: ");
        goto end;
    }
    f->protoctx = &ssn;
    f->proto = IPPROTO_TCP;
    p->flow = f;

    p->flowflags |= FLOW_PKT_TOSERVER;
    p->flowflags |= FLOW_PKT_ESTABLISHED;
    p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST;

    f->alproto = ALPROTO_HTTP;

    StreamTcpInitConfig(TRUE);

    de_ctx = DetectEngineCtxInit();
    if (de_ctx == NULL) {
        goto end;
    }
    de_ctx->flags |= DE_QUIET;

    s = de_ctx->sig_list = SigInit(de_ctx, "alert http any any -> any any "
                                   "(msg:\"Test content option\"; "
                                   "sid:1;)");
    if (s == NULL) {
        goto end;
    }

    SigGroupBuild(de_ctx);
    DetectEngineThreadCtxInit(&tv, (void *)de_ctx, (void *)&det_ctx);

    FLOWLOCK_WRLOCK(f);
    int r = AppLayerParserParse(NULL, alp_tctx, f, ALPROTO_HTTP,
                                STREAM_TOSERVER, http_buf1, http_buf1_len);
    if (r != 0) {
        printf("toserver chunk 1 returned %" PRId32 ", expected 0: ", r);
        FLOWLOCK_UNLOCK(f);
        goto end;
    }
    FLOWLOCK_UNLOCK(f);

    http_state = f->alstate;
    if (http_state == NULL) {
        printf("no http state: ");
        goto end;
    }

    /* do detect */
    SigMatchSignatures(&tv, de_ctx, det_ctx, p);

    if (!PacketAlertCheck(p, 1)) {
        printf("sig 1 didn't alert, but it should: ");
        goto end;
    }
    result = 1;
 end:
    if (alp_tctx != NULL)
        AppLayerParserThreadCtxFree(alp_tctx);
    if (det_ctx != NULL)
        DetectEngineThreadCtxDeinit(&tv, det_ctx);
    if (de_ctx != NULL)
        SigGroupCleanup(de_ctx);
    if (de_ctx != NULL)
        DetectEngineCtxFree(de_ctx);

    StreamTcpFreeConfig(TRUE);

    UTHFreePackets(&p, 1);
    UTHFreeFlow(f);
    return result;
}

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.