{"id":3959,"date":"2021-12-02T11:48:46","date_gmt":"2021-12-02T06:18:46","guid":{"rendered":"https:\/\/xiarch.com\/blog\/?p=3959"},"modified":"2021-12-02T11:48:48","modified_gmt":"2021-12-02T06:18:48","slug":"how-mozilla-fixes-critical-flaw-in-cross-platform-crypto-library","status":"publish","type":"post","link":"https:\/\/xiarch.com\/blog\/how-mozilla-fixes-critical-flaw-in-cross-platform-crypto-library\/","title":{"rendered":"How Mozilla Fixes Critical Flaw in Cross-Platform Crypto Library?"},"content":{"rendered":"\n

Mozilla recently addressed a critical memory corruption vulnerability impacting its cross-platform Network Security Services (NSS) set of cryptography libraries. NSS can be utilized to develop security-enabled client and server applications with support for SSL v3, TLS, PKCS #7, PKCS #11, PKCS #12, S\/MIE, X.509 v3 certificates, and many more other security standards.<\/p><\/p>\n\n\n\n

The security bug was discovered by Google vulnerability researcher Tavis Ormandy is NSS version before 3.73 or 3.68.1 ESR – who also dubbed it BigSig \u2013 and is now tracked as CVE-2021-43527. It can result in a heap-based buffer overflow when handling DER-encoded DSA or RSA-PSS signatures in email clients and PDF viewers utilizing vulnerable NSS versions (the flaw has been fixed in NSS 3.68.1 and NSS 3.73).<\/p><\/p>\n\n\n\n

The impact of successful heap overflow explanation can rely on program crashes and arbitrary code execution to bypass security software if code execution is achieved.<\/p><\/p>\n\n\n\n

\"How-Mozilla-Fixes-Critical-Flaw-in-Cross-Platform-Crypto-Library-image1\"<\/figure><\/div>\n\n\n\n

The version Released In October 2021 Vulnerable<\/strong><\/h2>\n\n\n\n

“Applications using NSS for handling signatures encoded within CMS, S\/MIME, PKCS #7, or PKCS #12 are likely to be impacted,” Mozilla said in a security advisory issued today. “Applications using NSS for certificate validation or other TLS, X.509, OCSP or CRL functionality may be impacted, depending on how they configure NSS.”<\/p><\/p>\n\n\n\n

“We believe all versions of NSS since 3.14 (released October 2012) are vulnerable,” Ormandy added on the Project Zero issue tracker. “Mozilla plan to produce a thorough list of affected APIs – but the summary is any standard use of NSS is affected. The bug is simple to reproduce and affects multiple algorithms.”<\/p><\/p>\n\n\n\n

Luckily, according to Mozilla, this vulnerability doesn’t impact the Mozilla Firefox web browser. However, all PDF viewers and email clients which use NSS for signature verification are believed to be impacted.<\/p><\/p>\n\n\n\n

Where NSS is utilized in Mozilla?<\/strong><\/h2>\n\n\n\n
  • Firefox, Thunderbird, SeaMonkey, and Firefox OS.<\/li>
  • Open-source client applications such as Evolution, Pidgin, Apache OpenOffice, and LibreOffice.<\/li>
  • Server products from Red Hat: Red Hat Directory Server, Red Hat Certificate System, and the mod_nss SSL module for the Apache webserver.<\/li>
  • Server products from Oracle (formerly Sun Java Enterprise System), including Oracle Communications Messaging Server and Oracle Directory Server Enterprise Edition.<\/li>
  • SUSE Linux Enterprise Server supports NSS and the mod_nss SSL module for the Apache webserver.<\/li><\/ul>\n\n\n\n

    If one is a vendor that distributes NSS in the products, you will most likely need to update or backport the patch.<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

    Mozilla recently addressed a critical memory corruption vulnerability impacting its cross-platform Network Security Services (NSS) set of cryptography libraries. NSS can be utilized to develop security-enabled client and server applications with support for SSL v3, TLS, PKCS #7, PKCS #11, PKCS #12, S\/MIE, X.509 v3 certificates, and many more other security standards. The security bug […]<\/p>\n","protected":false},"author":2,"featured_media":3962,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[],"yoast_head":"\nHow Mozilla Fixes Critical Flaw in Cross-Platform Crypto Library? - Xiarch Solutions Private Limited<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/xiarch.com\/blog\/how-mozilla-fixes-critical-flaw-in-cross-platform-crypto-library\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How Mozilla Fixes Critical Flaw in Cross-Platform Crypto Library? - Xiarch Solutions Private Limited\" \/>\n<meta property=\"og:description\" content=\"Mozilla recently addressed a critical memory corruption vulnerability impacting its cross-platform Network Security Services (NSS) set of cryptography libraries. 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