# [Critical] Photon OS Security Update   
## Summary   
Advisory ID : PHSA-2021-4.0-0012    
Type : Security   
Severity : ['Critical', 'Important']    
Issued on : 2021-04-21   
Affected Versions : Photon OS 4.0    
   
## Details   
An update of {'rust', 'nettle'} packages of Photon OS has been released.   
   
## Affected Packages:    
### Critical    
rust - ['[CVE-2021-31162](https://nvd.nist.gov/vuln/detail/CVE-2021-31162)']    
### Important    
nettle - ['[CVE-2021-20305](https://nvd.nist.gov/vuln/detail/CVE-2021-20305)']    
   
## Solution     
Update the affected packages (tdnf update _package_)     
## Updated Packages Information    
nettle-3.7.2-1.ph4.x86_64.rpm , sha256 : 73ebb8d8561654e8cb07ef3584252e99b4a464acff9898f4aec2845281304f41 , size : 358K , build_date : Wed, 21 Apr 2021 02:50:34 UTC    
nettle-devel-3.7.2-1.ph4.x86_64.rpm , sha256 : 69c5ac562c6cbc13f2930419132732f7a3a3004561c742211935c65eda2579bb , size : 50K , build_date : Wed, 21 Apr 2021 02:50:34 UTC    
rust-1.51.0-1.ph4.x86_64.rpm , sha256 : c5ecba9baecba1936f131bf36673c8fda922222236f0b2cfce40fa4443a753eb , size : 105M , build_date : Wed, 21 Apr 2021 02:54:38 UTC