What is CVE-2021-39563?

CVE-2021-39563 is a medium-severity vulnerability in Swftools, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-09-20.

How severe is CVE-2021-39563?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2021-39563 known to be exploited?

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

NULL pointer dereference in Swftools

CVE-2021-39563

An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_DumpActions() located in swfaction.c. It allows an attacker to cause Denial of Service.

EPSS: 0.006 (46.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Swftools
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

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-2021-39563?: CVE-2021-39563 is a medium-severity vulnerability in Swftools, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-09-20.
How severe is CVE-2021-39563?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2021-39563 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.