Low: openssl

Issue Overview:

An integer overflow was found in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. As per upstream:

• No EC algorithms are affected.
• Attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely.
• Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway.
• Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME (CVE-2019-1551)

Affected Packages:

openssl

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 openssl to update your system.

New Packages:

aarch64:  
    openssl-1.0.2k-19.amzn2.0.7.aarch64  
    openssl-libs-1.0.2k-19.amzn2.0.7.aarch64  
    openssl-devel-1.0.2k-19.amzn2.0.7.aarch64  
    openssl-static-1.0.2k-19.amzn2.0.7.aarch64  
    openssl-perl-1.0.2k-19.amzn2.0.7.aarch64  
    openssl-debuginfo-1.0.2k-19.amzn2.0.7.aarch64  
  
i686:  
    openssl-1.0.2k-19.amzn2.0.7.i686  
    openssl-libs-1.0.2k-19.amzn2.0.7.i686  
    openssl-devel-1.0.2k-19.amzn2.0.7.i686  
    openssl-static-1.0.2k-19.amzn2.0.7.i686  
    openssl-perl-1.0.2k-19.amzn2.0.7.i686  
    openssl-debuginfo-1.0.2k-19.amzn2.0.7.i686  
  
src:  
    openssl-1.0.2k-19.amzn2.0.7.src  
  
x86_64:  
    openssl-1.0.2k-19.amzn2.0.7.x86_64  
    openssl-libs-1.0.2k-19.amzn2.0.7.x86_64  
    openssl-devel-1.0.2k-19.amzn2.0.7.x86_64  
    openssl-static-1.0.2k-19.amzn2.0.7.x86_64  
    openssl-perl-1.0.2k-19.amzn2.0.7.x86_64  
    openssl-debuginfo-1.0.2k-19.amzn2.0.7.x86_64  

Additional References

Red Hat: CVE-2019-1551

Mitre: CVE-2019-1551