Heap Buffer Overflow Vulnerability in Telegram's Custom Lottie Library
CVE-2021-31323

5.5MEDIUM

Key Information:

Vendor

Telegram

Status
Telegram
Vendor
CVE Published:
18 May 2021
đź”” Create Telegram Vulnerability Alert

What is CVE-2021-31323?

The Telegram app for Android, iOS, and macOS has a vulnerability in its custom implementation of the rlottie library, specifically in the LottieParserImpl::parseDashProperty function. This vulnerability allows a remote attacker to exploit a heap buffer overflow through malicious animated stickers, potentially leading to unauthorized access to heap memory on the victim's device.

References

https://www.shielder.it/blog/2021/02/hunting-for-bugs-in-...
x_refsource_MISC
https://www.shielder.it/advisories/telegram-rlottie-lotti...
x_refsource_MISC

CVSS V3.1

Score:
5.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2021-31323 : Heap Buffer Overflow Vulnerability in Telegram's Custom Lottie Library