Cloud Vulnerability DB
A community-led vulnerabilities database
Vulnerability DatabaseCVE-2021-39553
CVE-2021-39553:
NixOS vulnerability analysis and mitigation
Overview
An issue was discovered in swftools through 20200710. A NULL pointer dereference exists in the function grealloc() located in gmem.cc. It allows an attacker to cause Denial of Service (NVD, GitHub Issue).
Technical details
The vulnerability is a NULL pointer dereference vulnerability found in the grealloc() function within the gmem.cc file of swftools. The CVSS v3.1 base score is 5.5 (MEDIUM) with vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The CVSS v2.0 base score is 4.3 (MEDIUM) with vector: (AV:N/AC:M/Au:N/C:N/I:N/A:P) (NVD).
Impact
When successfully exploited, this vulnerability allows an attacker to cause a Denial of Service condition in the affected system. The vulnerability affects the availability of the system but does not impact confidentiality or integrity (NVD).
Mitigation and workarounds
Users should upgrade to a version newer than swftools 20200710. No specific workarounds have been publicly documented (NVD).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Additional Wiz resources
Get a personalized demo
Ready to see Wiz in action?
"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management