Heap Buffer Overflow Vulnerability in Telegram by Telegram Messenger LLP
CVE-2021-31320

7.1HIGH

Key Information:

Vendor

Telegram

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

What is CVE-2021-31320?

A heap buffer overflow vulnerability exists in the Telegram application across various platforms, including Android, iOS, and macOS. This issue is linked to the VGradientCache::generateGradientColorTable function within Telegram's custom implementation of the rlottie library. By sending specially crafted animated stickers, a remote attacker could potentially execute out-of-bound memory writes, compromising the affected devices and leading to arbitrary code execution or denial of service.

References

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

CVSS V3.1

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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