Important: libldb

Issue Overview:

A flaw was found in Samba’s libldb. Multiple, consecutive leading spaces in an LDAP attribute can lead to an out-of-bounds memory write, leading to a crash of the LDAP server process handling the request. The highest threat from this vulnerability is to system availability. (CVE-2021-20277)

Affected Packages:

libldb

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update libldb to update your system.

New Packages:

aarch64:  
    libldb-1.5.4-2.amzn2.aarch64  
    ldb-tools-1.5.4-2.amzn2.aarch64  
    libldb-devel-1.5.4-2.amzn2.aarch64  
    pyldb-1.5.4-2.amzn2.aarch64  
    pyldb-devel-1.5.4-2.amzn2.aarch64  
    libldb-debuginfo-1.5.4-2.amzn2.aarch64  
  
i686:  
    libldb-1.5.4-2.amzn2.i686  
    ldb-tools-1.5.4-2.amzn2.i686  
    libldb-devel-1.5.4-2.amzn2.i686  
    pyldb-1.5.4-2.amzn2.i686  
    pyldb-devel-1.5.4-2.amzn2.i686  
    libldb-debuginfo-1.5.4-2.amzn2.i686  
  
src:  
    libldb-1.5.4-2.amzn2.src  
  
x86_64:  
    libldb-1.5.4-2.amzn2.x86_64  
    ldb-tools-1.5.4-2.amzn2.x86_64  
    libldb-devel-1.5.4-2.amzn2.x86_64  
    pyldb-1.5.4-2.amzn2.x86_64  
    pyldb-devel-1.5.4-2.amzn2.x86_64  
    libldb-debuginfo-1.5.4-2.amzn2.x86_64  

Additional References

Red Hat: CVE-2021-20277

Mitre: CVE-2021-20277