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USN-4338-1: re2c vulnerability re2c vulnerability A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.10 Summary re2c could be made to execute arbitrary code if it received a specially crafted file. Software Description re2c – tool for generating fast C-based recognizers Details Agostino Sarubbo discovered that re2c incorrectly handled certain files. An attacker could possibly use this issue to execute arbitrary code. Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 19.10 re2c – 1.2.1-1ubuntu0.1 To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades. In general, a standard system update will make all the necessary changes. References CVE-2020-11958 Source: USN-4338-1: re2c vulnerability

USN-4337-1: OpenJDK vulnerabilities openjdk-8, openjdk-lts vulnerabilities A security issue affects these releases of Ubuntu and its derivatives: Ubuntu 19.10 Ubuntu 18.04 LTS Ubuntu 16.04 LTS Summary Several security issues were fixed in OpenJDK. Software Description openjdk-8 – Open Source Java implementation openjdk-lts – Open Source Java implementation Details It was discovered that OpenJDK incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a denial of service while processing a specially crafted regular expression. (CVE-2020-2754, CVE-2020-2755) It was discovered that OpenJDK incorrectly handled class descriptors and catching exceptions during object stream deserialization. An attacker could possibly use this issue to cause a denial of service while processing a specially crafted serialized input. (CVE-2020-2756, CVE-2020-2757) Bengt Jonsson, Juraj Somorovsky, Kostis Sagonas, Paul Fiterau Brostean and Robert Merget discovered that OpenJDK incorrectly handled certificate messages during TLS handshake. [ more… ]