What is CVE-2021-39558?

CVE-2021-39558 is a high-severity vulnerability in Swftools, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-20.

How severe is CVE-2021-39558?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2021-39558 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Swftools

CVE-2021-39558

An issue was discovered in swftools through 20200710. A stack-buffer-overflow exists in the function VectorGraphicOutputDev::drawGeneralImage() located in VectorGraphicOutputDev.cc. It allows an attacker to cause code Execution.

Vulnerability class: Buffer Overflow

EPSS: 0.011 (60.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Swftools
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

Public proof-of-concept exploits

seviezhou/Kraken

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-39558?: CVE-2021-39558 is a high-severity vulnerability in Swftools, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2021-09-20.
How severe is CVE-2021-39558?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2021-39558 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.