Root shell via unbounded pppoeUser sprintf formatting
Published Aug 25, 2022 · Updated Aug 3, 2024
Stack overflow in TOTOLINK A7000R 9.1.0u.6115_B20201022 allows remote attackers to obtain a root shell via pppoeUser. The setOpModeCfg handler passes attacker-controlled pppoeUser data through sprintf into a fixed-size stack destination without limiting the input length. The published request carries a session cookie, so unauthenticated reachability is not established despite the disclosure's root-shell claim.
Summary
What happened
Stack overflow in TOTOLINK A7000R 9.1.0u.6115_B20201022 allows remote attackers to obtain a root shell via pppoeUser. The setOpModeCfg handler passes attacker-controlled pppoeUser data through sprintf into a fixed-size stack destination without limiting the input length. The published request carries a session cookie, so unauthenticated reachability is not established despite the disclosure's root-shell claim.
The record
- CVE
- CVE-2022-37077
- Published
- Aug 25, 2022
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1068
- Attack vector
- network
- Privileges
- authenticated
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
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
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
- A7000R pppoeUser stack-overflow proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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