What is CVE-2022-4291?

CVE-2022-4291 is a high-severity vulnerability in Avast Script Shield, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.7/10. Published 2022-12-08.

How severe is CVE-2022-4291?

High severity. CVSS v3 base score is 7.7 out of 10.

Buffer overflow in Avast Script Shield

CVE-2022-4291

The aswjsflt.dll library from Avast Antivirus windows contained a potentially exploitable heap corruption vulnerability that could enable an attacker to bypass the sandbox of the application it was loaded into, if applicable. This issue was fixed in version 18.0.1478 of the Script Shield Component.

Vulnerability class: Buffer Overflow

EPSS: 0.004 (34.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:L.

Affected products

Avast Script_shield
Nortonlifelock Avast Antivirus — versions 0

Weakness classification (CWE)

References

security@nortonlifelock.com (Vendor Advisory)

Frequently asked questions

What is CVE-2022-4291?: CVE-2022-4291 is a high-severity vulnerability in Avast Script Shield, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.7/10. Published 2022-12-08.
How severe is CVE-2022-4291?: High severity. CVSS v3 base score is 7.7 out of 10.