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CVE-2022-0778 Detail

Current Description

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).


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://seclists.org/fulldisclosure/2022/May/33
http://seclists.org/fulldisclosure/2022/May/35
http://seclists.org/fulldisclosure/2022/May/38
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=3118eb64934499d93db3230748a452351d1d9a65 Mailing List  Patch  Vendor Advisory 
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=a466912611aa6cbdf550cd10601390e587451246 Mailing List  Patch  Vendor Advisory 
https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2022/03/msg00024.html Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/323SNN6ZX7PRJJWP2BUAFLPUAE42XWLZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GDB3GQVJPXJE7X5C5JN6JAA4XUDWD6E6/ Mailing List 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W6K3PR542DXWLEFFMFIDMME4CWMHJRMG/
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0002 Third Party Advisory 
https://security.netapp.com/advisory/ntap-20220321-0002/ Third Party Advisory 
https://security.netapp.com/advisory/ntap-20220429-0005/
https://support.apple.com/kb/HT213255
https://support.apple.com/kb/HT213256
https://support.apple.com/kb/HT213257
https://www.debian.org/security/2022/dsa-5103 Third Party Advisory 
https://www.openssl.org/news/secadv/20220315.txt Vendor Advisory 
https://www.oracle.com/security-alerts/cpuapr2022.html
https://www.tenable.com/security/tns-2022-06
https://www.tenable.com/security/tns-2022-07
https://www.tenable.com/security/tns-2022-08
https://www.tenable.com/security/tns-2022-09

Weakness Enumeration

CWE-ID CWE Name Source
CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop') cwe source acceptance level NIST  

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Change History

17 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-0778
NVD Published Date:
03/15/2022
NVD Last Modified:
05/17/2022
Source:
OpenSSL Software Foundation