CVE-2019-1551MediumMicrosoft CVSS 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Microsoft advisory for CVE-2019-1551

Published
April 29, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2019-1551 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2019-1551. This page also shows what EchelonGraph holds for CVE-2019-1551, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products10

  • azl3 rust 1.75.0-27 on Azure Linux 3.0
  • azl3 rust 1.75.0-28 on Azure Linux 3.0
  • azl3 rust 1.90.0-6 on Azure Linux 3.0
  • azl3 rust 1.90.0-7 on Azure Linux 3.0
  • cbl2 cloud-hypervisor 32.0-7 on CBL Mariner 2.0
  • cbl2 edk2 20230301gitf80f052277c8-47 on CBL Mariner 2.0
  • cbl2 hvloader 1.0.1-18 on CBL Mariner 2.0
  • cbl2 openssl 1.1.1k-39 on CBL Mariner 2.0
  • cbl2 qemu 6.2.0-27 on CBL Mariner 2.0
  • cbl2 rust 1.72.0-15 on CBL Mariner 2.0

🧭 EchelonGraph on CVE-2019-1551

EchelonGraph score
5.3 MEDIUM
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that 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. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

Published by OpenSSL Software Foundation, the CVE Numbering Authority that assigned CVE-2019-1551, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (1)