CVE-2021-27439 TencentOS-tiny Integer Overflow or Wraparound
An integer overflow in TencentOS-tiny's memory allocator allows attackers to cause crashes or execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-27439?
CVE-2021-27439 is a high-severity vulnerability in TencentOS-tiny, published on 3 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.
Weakness: CWE-190
Which versions are affected by CVE-2021-27439?
It affects 1 product.
Products include Tencent Tencentos-Tiny.
How do I fix CVE-2021-27439?
No fix has been published for CVE-2021-27439 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-27439 being exploited?
There is no known exploitation of CVE-2021-27439 in the wild and no public exploit code.
Sources
Also known as GHSA-q338-m4f4-2mm6.