Root shell via unbounded SSID parameter parsing
Published Aug 25, 2022 · Updated Aug 3, 2024
Stack overflow in Edit_BasicSSID_5G in H3C B5 Mini B5MiniV100R005 allows remote attackers to execute code via a crafted HTTP POST request. The function parses the attacker-controlled param value with sscanf using an unbounded %[^;] conversion into a fixed-size stack buffer, so an overlong SSID field overwrites adjacent stack memory. The web request requires no authorization, and successful control of the overwrite grants a root shell; the demonstrated payload also restarts the process, causing a service interrupt.
Summary
What happened
Stack overflow in Edit_BasicSSID_5G in H3C B5 Mini B5MiniV100R005 allows remote attackers to execute code via a crafted HTTP POST request. The function parses the attacker-controlled param value with sscanf using an unbounded %[^;] conversion into a fixed-size stack buffer, so an overlong SSID field overwrites adjacent stack memory. The web request requires no authorization, and successful control of the overwrite grants a root shell; the demonstrated payload also restarts the process, causing a service interrupt.
The record
- CVE
- CVE-2022-36473
- Published
- Aug 25, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 25, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Published CVSS scores
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Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
- Edit_BasicSSID_5G crafted HTTP POST proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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