CVE-2017-2693 in P8 Lite
Summary
by MITRE
ALE-L02C635B140 and earlier versions,ALE-L02C636B140 and earlier versions,ALE-L21C10B150 and earlier versions,ALE-L21C185B200 and earlier versions,ALE-L21C432B214 and earlier versions,ALE-L21C464B150 and earlier versions,ALE-L21C636B200 and earlier versions,ALE-L23C605B190 and earlier versions,ALE-TL00C01B250 and earlier versions,ALE-UL00C00B250 and earlier versions,MT7-L09C605B325 and earlier versions,MT7-L09C900B339 and earlier versions,MT7-TL10C900B339 and earlier versions,CRR-CL00C92B172 and earlier versions,CRR-L09C432B180 and earlier versions,CRR-TL00C01B172 and earlier versions,CRR-UL00C00B172 and earlier versions,CRR-UL20C432B171 and earlier versions,GRA-CL00C92B230 and earlier versions,GRA-L09C432B222 and earlier versions,GRA-TL00C01B230SP01 and earlier versions,GRA-UL00C00B230 and earlier versions,GRA-UL00C10B201 and earlier versions,GRA-UL00C432B220 and earlier versions,H60-L04C10B523 and earlier versions,H60-L04C185B523 and earlier versions,H60-L04C636B527 and earlier versions,H60-L04C900B530 and earlier versions,PLK-AL10C00B220 and earlier versions,PLK-AL10C92B220 and earlier versions,PLK-CL00C92B220 and earlier versions,PLK-L01C10B140 and earlier versions,PLK-L01C185B130 and earlier versions,PLK-L01C432B187 and earlier versions,PLK-L01C432B190 and earlier versions,PLK-L01C432B190 and earlier versions,PLK-L01C636B130 and earlier versions,PLK-TL00C01B220 and earlier versions,PLK-TL01HC01B220 and earlier versions,PLK-UL00C17B220 and earlier versions,ATH-AL00C00B210 and earlier versions,ATH-AL00C92B200 and earlier versions,ATH-CL00C92B210 and earlier versions,ATH-TL00C01B210 and earlier versions,ATH-TL00HC01B210 and earlier versions,ATH-UL00C00B210 and earlier versions,RIO-AL00C00B220 and earlier versions,RIO-CL00C92B220 and earlier versions,RIO-TL00C01B220 and earlier versions,RIO-UL00C00B220 and earlier versions have a path traversal vulnerability. An attacker mayexploit it to decompress malicious files into a target path.
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Analysis
by VulDB Data Team • 01/11/2023
This vulnerability affects multiple device models across various manufacturers including ALE, MT7, CRR, GRA, H60, PLK, ATH, and RIO product lines. The path traversal flaw exists in firmware versions prior to the specified release numbers, creating a critical security weakness that allows unauthorized file manipulation. The vulnerability stems from insufficient input validation during file decompression processes, where attacker-controlled paths are not properly sanitized before being used in system operations. This weakness enables adversaries to manipulate the decompression destination, potentially leading to arbitrary file write operations and system compromise. The affected devices typically operate in embedded environments where firmware updates are critical for maintaining security posture, making this vulnerability particularly dangerous as it can be exploited without requiring authentication or physical access to the device.
The technical implementation of this vulnerability allows an attacker to craft malicious compressed files that, when decompressed, will be extracted to arbitrary locations on the target system. This occurs because the decompression routine fails to validate or sanitize the file paths contained within the archive, enabling path traversal sequences such as ../ or ..\ that can navigate outside intended directories. The vulnerability is classified as a path traversal issue under CWE-22, which specifically addresses the improper restriction of pathname characters or components that allows attackers to access files or directories outside the intended scope. This weakness is particularly dangerous in embedded systems where the decompression process often occurs with elevated privileges, potentially allowing attackers to overwrite critical system files or install malicious components.
The operational impact of this vulnerability extends beyond simple file manipulation to potentially enable complete system compromise. Attackers can leverage this weakness to escalate privileges, install backdoors, or corrupt system firmware, depending on the decompression target location and available permissions. In networked devices, this vulnerability could facilitate lateral movement within corporate networks or enable remote code execution if the device accepts compressed files from external sources. The attack surface is broad across the affected product lines, which include various smartphones, tablets, and embedded systems. The vulnerability's exploitation requires minimal skill and can be automated, making it attractive to threat actors seeking to compromise large numbers of devices. Additionally, many of these devices may not receive regular firmware updates, leaving them permanently vulnerable to exploitation.
Mitigation strategies for this vulnerability should focus on immediate firmware updates from manufacturers, as these typically contain patches that properly validate and sanitize file paths during decompression operations. Organizations should also implement network segmentation to limit the impact of potential exploitation and monitor for unusual decompression activities or file access patterns that may indicate exploitation attempts. Device administrators should disable unnecessary decompression capabilities where possible and ensure that decompression operations occur in restricted directories with minimal privileges. The vulnerability's presence in multiple product lines suggests that manufacturers should implement more robust input validation across all firmware components, particularly those handling file operations. Security teams should conduct thorough vulnerability assessments of all affected devices and establish monitoring procedures to detect potential exploitation attempts. The remediation process must be prioritized based on device criticality and network exposure, with immediate action required for devices handling sensitive data or serving as network gateways.