Heap memory disclosure via unchecked color-point count
Published May 18, 2021 · Updated Aug 3, 2024
Heap buffer overflow in Telegram Android before 7.1.0 (2090), iOS before 7.1, and macOS before 7.1 lets remote attackers read heap memory. LOTGradient::populate trusts an animated sticker's declared color-point count as its loop bound without checking the underlying gradient-data length, causing its heap pointer to advance beyond the available points. A victim must open a secret chat containing the crafted sticker; the demonstrated consequence is an out-of-bounds heap read rather than memory modification or code execution.
Summary
What happened
Heap buffer overflow in Telegram Android before 7.1.0 (2090), iOS before 7.1, and macOS before 7.1 lets remote attackers read heap memory. LOTGradient::populate trusts an animated sticker's declared color-point count as its loop bound without checking the underlying gradient-data length, causing its heap pointer to advance beyond the available points. A victim must open a secret chat containing the crafted sticker; the demonstrated consequence is an out-of-bounds heap read rather than memory modification or code execution.
The record
- CVE
- CVE-2021-31322
- Published
- May 18, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-787, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 18, 2021CVE 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.
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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