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CVE-2021-39588: An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_ReadABC() located in abc.c. It allows an attacker to cause Denial of Service.
CVE-2021-39588 · published 5 years ago
Summary
An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_ReadABC() located in abc.c. It allows an attacker to cause Denial of Service.
What to do
The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.
Affected software
| Vendor | Product | Affected versions |
|---|---|---|
| swftools | swftools |
<= 2020-07-10 cpe:2.3:a:swftools:swftools:*:*:*:*:*:*:*:* |
Original advisory text
An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_ReadABC() located in abc.c. It allows an attacker to cause Denial of Service.
An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function swf_ReadABC() located in abc.c. It allows an attacker to cause Denial of Service.
References
- https://github.com/matthiaskramm/swftools/issues/131 Exploit Issue Tracking Third Party Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Type
CWE-476NULL Pointer Dereference
Timeline
Published20 Sep 2021
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2021-39588 · NVD
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