CVE-2017-13719

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Summary

CVECVE-2017-13719
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-07-03 20:15:00 UTC
Updated2019-07-17 15:09:00 UTC
DescriptionThe Amcrest IPM-721S Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 allows HTTP requests that permit enabling various functionalities of the camera by using HTTP APIs, instead of the web management interface that is provided by the application. This HTTP API receives the credentials as base64 encoded in the Authorization HTTP header. However, a missing length check in the code allows an attacker to send a string of 1024 characters in the password field, and allows an attacker to exploit a memory corruption issue. This can allow an attacker to circumvent the account protection mechanism and brute force the credentials. If the firmware version Amcrest_IPC-AWXX_Eng_N_V2.420.AC00.17.R.20170322 is dissected using the binwalk tool, one obtains a _user-x.squashfs.img.extracted archive which contains the filesystem set up on the device that has many of the binaries in the /usr folder. The binary "sonia" is the one that has the vulnerable function that performs the credential check in the binary for the HTTP API specification. If we open this binary in IDA Pro we will notice that this follows an ARM little-endian format. The function at address 00415364 in IDA Pro starts the HTTP authentication process. This function calls another function at sub_ 0042CCA0 at address 0041549C. This function performs a strchr operation after base64 decoding the credentials, and stores the result on the stack, which results in a stack-based buffer overflow.

Risk And Classification

Problem Types: CWE-119

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Amcrest Ipm-721s - All All All
Hardware Amcrest Ipm-721s - All All All
Operating System Amcrest Ipm-721s Firmware amcrest_ipc-awxx_eng_n_v2.420.ac00.17.r.20170322 All All All
Operating System Amcrest Ipm-721s Firmware amcrest_ipc-awxx_eng_n_v2.420.ac00.17.r.20170322 All All All

References

ReferenceSourceLinkTags
Amcrest IPM-721S Credential Disclosure / Privilege Escalation ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
Bugtraq: Newly releases IoT security issues BUGTRAQ seclists.org Mailing List, Third Party Advisory
IoT_vulnerabilities/Amcrest_sec_issues.pdf at master · ethanhunnt/IoT_vulnerabilities · GitHub MISC github.com Exploit, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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