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Ubuntu Security Notice USN-5550-1

Ubuntu Security Notice 5550-1 - It was discovered that GnuTLS incorrectly handled certain memory operations. A remote attacker could possibly use this issue to cause GnuTLS to crash, resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. It was discovered that GnuTLS incorrectly handled the verification of certain pkcs7 signatures. A remote attacker could use this issue to cause GnuTLS to crash, resulting in a denial of service, or possibly execute arbitrary code.

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#vulnerability#ubuntu#dos#ssl
==========================================================================Ubuntu Security Notice USN-5550-1August 04, 2022gnutls28 vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 22.04 LTS- Ubuntu 20.04 LTS- Ubuntu 18.04 LTSSummary:Several security issues were fixed in GnuTLS.Software Description:- gnutls28: GNU TLS libraryDetails:It was discovered that GnuTLS incorrectly handled certain memoryoperations. A remote attacker could possibly use this issue to cause GnuTLSto crash, resulting in a denial of service. This issue only affected Ubuntu18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2021-4209)It was discovered that GnuTLS incorrectly handled the verification ofcertain pkcs7 signatures. A remote attacker could use this issue to causeGnuTLS to crash, resulting in a denial of service, or possibly executearbitrary code. (CVE-2022-2509)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 22.04 LTS:  libgnutls30                     3.7.3-4ubuntu1.1Ubuntu 20.04 LTS:  libgnutls30                     3.6.13-2ubuntu1.7Ubuntu 18.04 LTS:  libgnutls30                     3.5.18-1ubuntu1.6In general, a standard system update will make all the necessary changes.References:  https://ubuntu.com/security/notices/USN-5550-1  CVE-2021-4209, CVE-2022-2509Package Information:  https://launchpad.net/ubuntu/+source/gnutls28/3.7.3-4ubuntu1.1  https://launchpad.net/ubuntu/+source/gnutls28/3.6.13-2ubuntu1.7  https://launchpad.net/ubuntu/+source/gnutls28/3.5.18-1ubuntu1.6

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Red Hat Security Advisory 2022-6854-01 - The gnutls packages provide the GNU Transport Layer Security library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Nettle is a cryptographic library that is designed to fit easily in almost any context: In crypto toolkits for object-oriented languages, such as C++, Python, or Pike, in applications like LSH or GNUPG, or even in kernel space. Issues addressed include a double free vulnerability.

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CVE-2021-4209: Null pointer dereference in MD_UPDATE (#1306) · Issues · gnutls / GnuTLS · GitLab

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CVE-2022-2509: Red Hat Customer Portal - Access to 24x7 support and knowledge

A vulnerability found in gnutls. This security flaw happens because of a double free error occurs during verification of pkcs7 signatures in gnutls_pkcs7_verify function.

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