A vulnerability was found in Asus RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66U_B1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RT_AC1200GU, RT_AC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HP_B1, RT-N12D1, RT-N12+, RT_N12+_PRO, RT-N16 and RT-N300 and classified as critical. Affected by this issue is some unknown functionality of the component networkmap. The manipulation as part of a XML Document leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Stack buffer overflow in networkmap in Asuswrt-Merlin firmware for ASUS devices and ASUS firmware for ASUS RT-AC5300, RT_AC1900P, RT-AC68U, RT-AC68P, RT-AC88U, RT-AC66U, RT-AC66U_B1, RT-AC58U, RT-AC56U, RT-AC55U, RT-AC52U, RT-AC51U, RT-N18U, RT-N66U, RT-N56U, RT-AC3200, RT-AC3100, RT_AC1200GU, RT_AC1200G, RT-AC1200, RT-AC53, RT-N12HP, RT-N12HP_B1, RT-N12D1, RT-N12+, RT_N12+_PRO, RT-N16, and RT-N300 devices allows remote attackers to execute arbitrary code on the router by hosting a crafted device description XML document (that includes a serviceType element) at a URL specified within a Location header in an SSDP response.

The bug was discovered 07/14/2017. The weakness was presented 07/17/2017 (Website). The advisory is available at openwall.com. This vulnerability is handled as CVE-2017-11345 since 07/16/2017. The attack can only be initiated within the local network. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available.

The vulnerability was handled as a non-public zero-day exploit for at least 3 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Productinfo

Vendor

• Asus

Name

• RT-AC51U
• RT-AC52U
• RT-AC53
• RT-AC55U
• RT-AC56U
• RT-AC58U
• RT-AC66U
• RT-AC66U_B1
• RT-AC68P
• RT-AC88U
• RT-AC1200
• RT-AC3100
• RT-AC3200
• RT-N12+
• RT-N12D1
• RT-N12HP
• RT-N12HP_B1
• RT-N16
• RT-N18U
• RT-N56U
• RT-N66U
• RT-N300
• RT_AC1200G
• RT_AC1200GU
• RT_N12+_PRO

License

• commercial

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