Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2022-0778

The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. However any operation which requires the public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected 1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc).

Published

2022-03-15T17:15:08.513

Last Modified

2024-11-21T06:39:22.540

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-835
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application openssl openssl < 1.0.2zd Yes
Application openssl openssl < 1.1.1n Yes
Application openssl openssl < 3.0.2 Yes
Operating System debian debian_linux 9.0 Yes
Operating System debian debian_linux 10.0 Yes
Operating System debian debian_linux 11.0 Yes
Application netapp cloud_volumes_ontap_mediator - Yes
Application netapp clustered_data_ontap - Yes
Application netapp clustered_data_ontap_antivirus_connector - Yes
Application netapp santricity_smi-s_provider - Yes
Application netapp storagegrid - Yes
Operating System netapp a250_firmware - Yes
Hardware netapp a250 - No
Operating System netapp 500f_firmware - Yes
Hardware netapp 500f - No
Operating System fedoraproject fedora 34 Yes
Operating System fedoraproject fedora 36 Yes
Application tenable nessus < 8.15.4 Yes
Application tenable nessus < 10.1.2 Yes
Application mariadb mariadb < 10.2.42 Yes
Application mariadb mariadb < 10.3.33 Yes
Application mariadb mariadb < 10.4.23 Yes
Application mariadb mariadb < 10.5.14 Yes
Application mariadb mariadb < 10.6.6 Yes
Application mariadb mariadb < 10.7.2 Yes
Application nodejs node.js ≤ 12.12.0 Yes
Application nodejs node.js < 12.22.11 Yes
Application nodejs node.js ≤ 14.14.0 Yes
Application nodejs node.js < 14.19.1 Yes
Application nodejs node.js ≤ 16.12.0 Yes
Application nodejs node.js < 16.14.2 Yes
Application nodejs node.js < 17.7.2 Yes
References