Local data disclosure via unsafe read_file handling
Published Jun 12, 2021 · Updated Sep 17, 2024
Information disclosure in Canonical Apport allows local users to read private data through OpenJDK 16 crash-report hooks. The read_file() helper in apport/hookutils.py opens supplied paths while following symbolic links and can read from FIFOs instead of rejecting those special file types. A local user must place a malicious link or FIFO at a path consumed by the OpenJDK 16 hook; exposure is limited to data read by that privileged information-gathering operation.
Summary
What happened
Information disclosure in Canonical Apport allows local users to read private data through OpenJDK 16 crash-report hooks. The read_file() helper in apport/hookutils.py opens supplied paths while following symbolic links and can read from FIFOs instead of rejecting those special file types. A local user must place a malicious link or FIFO at a path consumed by the OpenJDK 16 hook; exposure is limited to data read by that privileged information-gathering operation.
The record
- CVE
- CVE-2021-32552
- Published
- Jun 12, 2021
- Updated
- Sep 17, 2024
- Vendor
- Canonical
- Product
- Apport
- Classifications
- CWE-59, CWE-61, T1005
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 12, 2021CVE publishedPublication date reported by the CVE source.
- Sep 17, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=2.14.1-0ubuntu3 <2.14.1-0ubuntu3.29+esm7
- Affected versionversion=2.20.11-0ubuntu27 <2.20.11-0ubuntu27.18
- Affected versionversion=2.20.11-0ubuntu50 <2.20.11-0ubuntu50.7
- Affected versionversion=2.20.11-0ubuntu65 <2.20.11-0ubuntu65.1
- Affected versionversion=2.20.1 <2.20.1-0ubuntu2.30+esm1
- Affected versionversion=2.20.9 <2.20.9-0ubuntu7.24
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
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
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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