CVE-2021-42203
HIGHCVSS 7.8/10EPSS 1.11%
Last modified
CVE-2021-42203 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. An issue was discovered in swftools through 20201222. A heap-use-after-free exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. EPSS estimates a 1.11% chance of exploitation in the next 30 days.
Description
An issue was discovered in swftools through 20201222. A heap-use-after-free exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.
Metrics
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Swftools | Swftools | <= 2020-12-22 |
References
- https://github.com/matthiaskramm/swftools/issues/176Exploit, Third Party Advisory
- https://github.com/matthiaskramm/swftools/issues/176Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42203?
An issue was discovered in swftools through 20201222. A heap-use-after-free exists in the function swf_FontExtract_DefineTextCallback() located in swftext.c. It allows an attacker to cause code execution.
How severe is CVE-2021-42203?
CVE-2021-42203 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.11% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42203?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-42203?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST