Heap data disclosure via FTP token mislocation
Published Feb 4, 2020 · Updated Aug 4, 2024
Information disclosure in Squid before 4.10 allows remote attackers controlling an FTP server to read heap data through the FTP gateway. The ftpListParseParts parser re-finds listing tokens with substring searches instead of retaining their offsets, allowing crafted fields to misplace the filename pointer and copy bytes beyond the received line. Exploitation requires an FTP request through Squid to the attacker-controlled server; exposed bytes can contain other clients' listings or, with memory pools disabled, unrelated process data.
Summary
What happened
Information disclosure in Squid before 4.10 allows remote attackers controlling an FTP server to read heap data through the FTP gateway. The ftpListParseParts parser re-finds listing tokens with substring searches instead of retaining their offsets, allowing crafted fields to misplace the filename pointer and copy bytes beyond the received line. Exploitation requires an FTP request through Squid to the attacker-controlled server; exposed bytes can contain other clients' listings or, with memory pools disabled, unrelated process data.
The record
- CVE
- CVE-2019-12528
- Published
- Feb 4, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 4, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Attacks
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Public exploit references
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Technologies
Your stack
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