【安全公告:UTSA-2022-000389】-【CVE-2022-0778】

公告编号:作者:USRC发布日期:2022/09/23

【统信安全公告:UTSA-2022-000389】-【CVE-2022-0778】


一、漏洞描述

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).

 

二、漏洞信息

漏洞编号:CVE-2022-0778

软件包名:intel-sgx-ssl

漏洞评级:高危

CVSS3.1评分:7.5

 

三、受影响UOS版本

服务器1050e、服务器1021e、服务器1020e

 

四、漏洞检测

检测方法如下:

                通过yum info Packagename查看包的版本信息

结果如下:

                版本<2.10-4.uel20受此漏洞影响,版本>=2.10-4.uel20此漏洞已修复

 

五、修复建议

                更新源后,使用yum install Packagename安装升级

 

六、修复状态

此漏洞补丁已于2022年9月13日推送至外网仓库源

 

七、修复验证

查看intel-sgx-ssl的版本>=2.10-4.uel20,说明此漏洞已修复

 

八、相关链接

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-0778

https://nvd.nist.gov/vuln/detail/CVE-2022-0778