Säkerhetshål i BBB Technicolor TG799vacXTREAM router, DnsMasq heap buffer overflow vulnerability, Severity:High
Körde Avast wifi test och fick att min BBB router Technicolor TG799vacXTREAM "Device is vulnerable to attack", klickade på Details för följande:
Description
Our scan found a vulnerability on your router or Wi-Fi hotspot device. Your device contains a problem that can be misused by cybercriminals to break into your network and compromise your security and privacy.Android devices used as a Wi-Fi hotspot can be also affected.
Solution
Some of the vulnerabilities may be patched in new versions of the device firmware or system update. Applying the latest firmware or system update may solve the issue. Consult your device's manual for instructions. If an update adressing the vulnerability issue is not available, contact your devices's vendor or manufacturer to provide an update as soon as possible.
Note:
As routers typically do not perform automatic updates, you need to manually download and install the appropriate patches on the device.
Done incorrectly, applying the latest firmware can make your router unusable. We recommend this method for advanced users or computer technicians only.
Details
We have identified the following problem with your router or Wi-Fi hotspot device:
DnsMasq heap buffer overflow vulnerability
Severity: High
Reference: CVE-2017-14491 | Google Security Blog
Description:
The affected device's DNS service is running an outdated version of the DnsMasq software which is known to have a heap buffer overflow vulnerability. A remote attacker can gain control of your network device and your Internet connection by sending malformed DNS packets to the device. It allows the attacker to intercept connections and perform a traffic hijack, or execute arbitrary code with unrestricted privileges as well as access all important and private data stored on the device -- your device login/password combination, your Wi-Fi password, and your configuration data.
Impact:
Any device connected to your network, including computers, phones, tablets, printers, security cameras, or any other networked device in your home or office network, may have an increased risk of compromise.
Recommendation:
The issue was fixed in DnsMasq software version 2.78, released in October 2017.
To solve the vulnerability on your device, apply the firmware or system update that contains DnsMasq software version 2.78 or higher provided by your device's manufacturer.
If an update addressing the vulnerability is not yet available for your device, you can secure your router or Wi-Fi hotspot with a strong password to minimize risks imposed by the vulnerability. We also advise you not to visit suspicious websites or run software from questionable sources.
Jag googla lite och det verkar iaf finnas en 17.2 firmware för routern (den kör idag 15.4). Jag skicka fråga till BBB support om säkerhetsproblemet och uppdatering av firmware. Fick följande svar:
"Tack för ditt mail. Routrarna uppdater sin mjukvara automatiskt och den nuvarande mjukvaran som är inlagd är våran nyaste. Kommer det en ny uppdatering vid ett senare tillfälle så kommer routern att ladda ner och installera den per automatik."
Så som vanligt skiter BBB fullkomligt i allt och alla. Firmwaren den har (15.4) som är "våran nyaste" verkar vara ifrån 2015. Finns det någon sätt för mig att få tag på nytt firmware och installera det? Jag kan inte hitta något i webAdmin gränssnittet för firmware uppdatering.
