Application denial of service via truncated Capsule-name comparison
Published Dec 17, 2021 · Updated Aug 4, 2024
Incorrect comparison in cvxopt 1.2.6 and earlier allows attackers to interrupt applications by passing forged Capsules to CHOLMOD APIs. The diag, getfactor, solve, and spsolve bindings compare only the first 14 bytes of a Capsule name with CHOLMOD FACTOR, so names containing malicious suffixes pass validation. Exploitation requires an attacker-controlled Python object to reach one of these APIs; the reported consequence is denial of service, with no reported data disclosure or modification.
Summary
What happened
Incorrect comparison in cvxopt 1.2.6 and earlier allows attackers to interrupt applications by passing forged Capsules to CHOLMOD APIs. The diag, getfactor, solve, and spsolve bindings compare only the first 14 bytes of a Capsule name with CHOLMOD FACTOR, so names containing malicious suffixes pass validation. Exploitation requires an attacker-controlled Python object to reach one of these APIs; the reported consequence is denial of service, with no reported data disclosure or modification.
The record
- CVE
- CVE-2021-41500
- Published
- Dec 17, 2021
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-697, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 17, 2021CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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