[Forgot Password]
Login  Register Subscribe

30389

 
 

423868

 
 

244625

 
 

909

 
 

193379

 
 

277

Paid content will be excluded from the download.


Download | Alert*
CVE
view JSON

CVE-2022-0778Date: (C)2022-03-16   (M)2024-03-20


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).

CVSS Score and Metrics +CVSS Score and Metrics -

CVSS V3 Severity:CVSS V2 Severity:
CVSS Score : 7.5CVSS Score : 5.0
Exploit Score: 3.9Exploit Score: 10.0
Impact Score: 3.6Impact Score: 2.9
 
CVSS V3 Metrics:CVSS V2 Metrics:
Attack Vector: NETWORKAccess Vector: NETWORK
Attack Complexity: LOWAccess Complexity: LOW
Privileges Required: NONEAuthentication: NONE
User Interaction: NONEConfidentiality: NONE
Scope: UNCHANGEDIntegrity: NONE
Confidentiality: NONEAvailability: PARTIAL
Integrity: NONE 
Availability: HIGH 
  
Reference:
http://seclists.org/fulldisclosure/2022/May/38
http://seclists.org/fulldisclosure/2022/May/35
http://seclists.org/fulldisclosure/2022/May/33
DSA-5103
FEDORA-2022-8bb51f6901
FEDORA-2022-9e88b5d8d7
FEDORA-2022-a5f51502f0
GLSA-202210-02
N/A
https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html
https://lists.debian.org/debian-lts-announce/2022/03/msg00024.html
http://packetstormsecurity.com/files/167344/OpenSSL-1.0.2-1.1.1-3.0-BN_mod_sqrt-Infinite-Loop.html
https://cert-portal.siemens.com/productcert/pdf/ssa-712929.pdf
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=3118eb64934499d93db3230748a452351d1d9a65
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=380085481c64de749a6dd25cdf0bcf4360b30f83
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=a466912611aa6cbdf550cd10601390e587451246
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0002
https://security.netapp.com/advisory/ntap-20220321-0002/
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.openssl.org/news/secadv/20220315.txt
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

CPE    3
cpe:/o:debian:debian_linux:9.0
cpe:/a:openssl:openssl
cpe:/a:mariadb:mariadb
CWE    1
CWE-835
OVAL    64
oval:org.secpod.oval:def:89950
oval:org.secpod.oval:def:706347
oval:org.secpod.oval:def:2107656
oval:org.secpod.oval:def:78537
...

© SecPod Technologies