CVE-2020-23321

There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0

published June 10, 2021

CVSS
—
EPSS
1%
Percentile
70.5
In the wild
Unconfirmed
What it is

⚠️ Heads up! There’s a heap-buffer-overflow lurking in JerryScript 2.2.0 that could potentially be a recipe for disaster! 🔍 Think of this vulnerability like a restaurant that overfills a dish, causing it to spill everywhere — not only ruining the meal, but also making a mess that could trip someone up. The overflow here can lead to unpredictable behavior in your application, much like a diner slipping on spilled soup! If exploited, this heap-buffer-overflow can lead to crashes or unexpected behavior in applications using JerryScript. While it’s not currently known to be exploited in the wild, this kind of vulnerability could open the door for attackers to cause chaos if they find the right circumstance!

Put simply

Think of this vulnerability like a restaurant that overfills a dish, causing it to spill everywhere — not only ruining the meal, but also making a mess that could trip someone up. The overflow here can lead to unpredictable behavior in your application, much like a diner slipping on spilled soup! This issue occurs in the function `lit_read_code_unit_from_utf8` in JerryScript, where an overflow can happen when reading UTF-8 code units, leading to memory corruption and potential application instability.

What to do

If exploited, this heap-buffer-overflow can lead to crashes or unexpected behavior in applications using JerryScript. While it’s not currently known to be exploited in the wild, this kind of vulnerability could open the door for attackers to cause chaos if they find the right circumstance! To remediate this, upgrade to the latest version of JerryScript where this issue has been addressed. Regularly review and test your applications for vulnerabilities, especially any dependent libraries. Don't forget to implement proper memory management practices! You've got this! Take these steps, and your application will be more secure in no time! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01314 · 70.5th percentile
Published
2021-06-10T22:14Z
EPSS history
Timeline
  • 10 JUN 22:14Z
    There is a heap-buffer-overflow at lit-strings.c:431 in lit_read_code_unit_from_utf8 in JerryScript 2.2.0
    cvelistv5