Service interruption via out-of-bounds XML parser read
Published May 26, 2022 · Updated Aug 4, 2024
Stack buffer overflow in Mini-XML 3.2 allows remote attackers to interrupt a consuming service through malformed XML passed to mxmlLoadString. mxml_string_getc reads one byte beyond the supplied string while parsing the malformed input, as demonstrated by AddressSanitizer at mxml-file.c line 2611. Reachability requires an application to pass attacker-controlled XML to this API, and the CVE remains disputed because the input's validity under the API specification is unclear.
Summary
What happened
Stack buffer overflow in Mini-XML 3.2 allows remote attackers to interrupt a consuming service through malformed XML passed to mxmlLoadString. mxml_string_getc reads one byte beyond the supplied string while parsing the malformed input, as demonstrated by AddressSanitizer at mxml-file.c line 2611. Reachability requires an application to pass attacker-controlled XML to this API, and the CVE remains disputed because the input's validity under the API specification is unclear.
The record
- CVE
- CVE-2021-42860
- Published
- May 26, 2022
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-772, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 26, 2022CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Weakness, pattern, technique
Public exploit references
- Mini-XML malformed-input libFuzzer test caseproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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