Foscam C1 Lite getSWFlag callbackJson memory corruption

Summaryinfo

A vulnerability was found in Foscam C1 Lite, C1, FI9800P, FI9803P, FI9851P, FI9853EP, FI9821P, FI9826P and FI9831P. It has been classified as critical. The affected element is the function getSWFlag. Performing a manipulation of the argument callbackJson as part of Parameter results in memory corruption. This vulnerability is identified as CVE-2018-6832. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Foscam C1 Lite, C1, FI9800P, FI9803P, FI9851P, FI9853EP, FI9821P, FI9826P and FI9831P. This affects the function getSWFlag. The manipulation of the argument callbackJson as part of a Parameter leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the getSWFlag function in Foscam Cameras C1 Lite V3, and C1 V3 with firmware 2.82.2.33 and earlier, FI9800P V3, FI9803P V4, FI9851P V3, and FI9853EP V2 2.84.2.33 and earlier, FI9816P V3, FI9821EP V2, FI9821P V3, FI9826P V3, and FI9831P V3 2.81.2.33 and earlier, C1, C1 V2, C1 Lite, and C1 Lite V2 2.52.2.47 and earlier, FI9800P, FI9800P V2, FI9803P V2, FI9803P V3, and FI9851P V2 2.54.2.47 and earlier, FI9815P, FI9815P V2, FI9816P, and FI9816P V2, 2.51.2.47 and earlier, R2 and R4 2.71.1.59 and earlier, C2 and FI9961EP 2.72.1.59 and earlier, FI9900EP, FI9900P, and FI9901EP 2.74.1.59 and earlier, FI9928P 2.74.1.58 and earlier, FI9803EP and FI9853EP 2.22.2.31 and earlier, FI9803P and FI9851P 2.24.2.31 and earlier, FI9821P V2, FI9826P V2, FI9831P V2, and FI9821EP 2.21.2.31 and earlier, FI9821W V2, FI9831W, FI9826W, FI9821P, FI9831P, and FI9826P 2.11.1.120 and earlier, FI9818W V2 2.13.2.120 and earlier, FI9805W, FI9804W, FI9804P, FI9805E, and FI9805P 2.14.1.120 and earlier, FI9828P, and FI9828W 2.13.1.120 and earlier, and FI9828P V2 2.11.1.133 and earlier allows remote attackers to cause a denial of service (crash and reboot), via the callbackJson parameter.

The bug was discovered 06/06/2018. The weakness was released 07/09/2018 (Website). It is possible to read the advisory at foscam.com. This vulnerability is uniquely identified as CVE-2018-6832 since 02/07/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 33 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.

Entries connected to this vulnerability are available at VDB-120949 and VDB-120950. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Foscam

Name

• C1
• C1 Lite
• FI9800P
• FI9803P
• FI9821P
• FI9826P
• FI9831P
• FI9851P
• FI9853EP

License

• commercial

Website

• Vendor: https://www.foscam.com/

CPE 2.3info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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