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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.2432 USN-6049-1: Netty vulnerabilities 2 May 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Netty Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2022-41915 CVE-2022-41881 CVE-2021-43797 CVE-2021-37137 CVE-2021-37136 CVE-2021-21409 CVE-2021-21295 CVE-2021-21290 CVE-2020-11612 Original Bulletin: https://ubuntu.com/security/notices/USN-6049-1 Comment: CVSS (Max): 7.5 CVE-2022-41881 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: NVD Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- USN-6049-1: Netty vulnerabilities 28 April 2023 Several security issues were fixed in Netty. Releases o Ubuntu 22.10 o Ubuntu 22.04 LTS o Ubuntu 20.04 LTS o Ubuntu 18.04 ESM o Ubuntu 16.04 ESM Packages o netty - Java NIO client/server socket framework Details It was discovered that Netty's Zlib decoders did not limit memory allocations. A remote attacker could possibly use this issue to cause Netty to exhaust memory via malicious input, leading to a denial of service. This issue only affected Ubuntu 16.04 ESM and Ubuntu 20.04 ESM. ( CVE-2020-11612 ) It was discovered that Netty created temporary files with excessive permissions. A local attacker could possibly use this issue to expose sensitive information. This issue only affected Ubuntu 16.04 ESM, Ubuntu 18.04 ESM, and Ubuntu 20.04 ESM. ( CVE-2021-21290 ) It was discovered that Netty did not properly validate content-length headers. A remote attacker could possibly use this issue to smuggle requests. This issue was only fixed in Ubuntu 20.04 ESM. ( CVE-2021-21295 , CVE-2021-21409 ) It was discovered that Netty's Bzip2 decompression decoder did not limit the decompressed output data size. A remote attacker could possibly use this issue to cause Netty to exhaust memory via malicious input, leading to a denial of service. This issue only affected Ubuntu 18.04 ESM, Ubuntu 20.04 ESM, Ubuntu 22.04 LTS, and Ubuntu 22.10. ( CVE-2021-37136 ) It was discovered that Netty's Snappy frame decoder function did not limit chunk lengths. A remote attacker could possibly use this issue to cause Netty to exhaust memory via malicious input, leading to a denial of service. ( CVE-2021-37137 ) It was discovered that Netty did not properly handle control chars at the beginning and end of header names. A remote attacker could possibly use this issue to smuggle requests. This issue only affected Ubuntu 18.04 ESM, Ubuntu 20.04 ESM, Ubuntu 22.04 LTS, and Ubuntu 22.10. ( CVE-2021-43797 ) It was discovered that Netty could be made into an infinite recursion when parsing a malformed crafted message. A remote attacker could possibly use this issue to cause Netty to crash, leading to a denial of service. This issue only affected Ubuntu 20.04 ESM, Ubuntu 22.04 LTS, and Ubuntu 22.10. ( CVE-2022-41881 ) It was discovered that Netty did not validate header values under certain circumstances. A remote attacker could possibly use this issue to perform HTTP response splitting via malicious header values. This issue only affected Ubuntu 18.04 ESM, Ubuntu 20.04 ESM, Ubuntu 22.04 LTS, and Ubuntu 22.10. ( CVE-2022-41915 ) Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu 22.10 o libnetty-java - 1:4.1.48-5ubuntu0.1 Ubuntu 22.04 o libnetty-java - 1:4.1.48-4+deb11u1build0.22.04.1 Ubuntu 20.04 o libnetty-java - 1:4.1.45-1ubuntu0.1~esm1 Available with Ubuntu Pro Ubuntu 18.04 o libnetty-java - 1:4.1.7-4ubuntu0.1+esm2 Available with Ubuntu Pro Ubuntu 16.04 o libnetty-java - 1:4.0.34-1ubuntu0.1~esm1 Available with Ubuntu Pro In general, a standard system update will make all the necessary changes. References o CVE-2021-21295 o CVE-2022-41881 o CVE-2021-37137 o CVE-2021-21290 o CVE-2021-37136 o CVE-2021-21409 o CVE-2020-11612 o CVE-2022-41915 o CVE-2021-43797 Related notices o USN-4600-2 : libnetty-java, netty - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBZFBfoMkNZI30y1K9AQhK/A/7BlXgpuq7qqA2Ujzl809uGVs23V35HCRq 0cvh78rquVt5tGEycVILKWCZC64k4e73IFQwYDGkIPzkUbfzxk5FSxGjtgkfm37v yQmbREMCRk2INYTB3jp+E2MaboCYckR0vvBjmriSM/kiDFRn+YNQL1eFGUclBgv4 LEz/NB141CE1AktPJe+o5mwwjEXWUpGN70Y0QkhrcnTgFaQZAxQ/z20b8+z2Xvju QV0sm/gZ0KjLlyB5t4IjWClVOLHxikBSBl1XaCoe5qF0meHWu6f5rPCJWlpeU7x/ Qw6NXsmx2Uysz+SJ8qfRWNboqo4eRkRo6y32E9HUjXrRlX/f7ZV2w0uaQdKDAL+3 Z2ynIjk7PrMSQs7nHWvjAdNCa1KZIVKlValrvKk2+1ddmqBEpiqkQd3P+dpuaJPh pRL9QursMsfu3UWTuED3GU1y5gKoP2C88+2WAcMqYyDGBaUvjS2Par6Z7scETOL1 UpswTZWUt3TxM4ptBgksoM1vgbHX5W7H6p++7SbN4OB2zQU2CBr/ZS5ZoPEwR0IS CtTPY0gI7fAZcFX6YSjzuWA1VHFfQfgv3uT/DKovEt5mXID1SB0sWSIjv3asaqpg m1KEqm0Hk9U5Dtjg44P4huqr1txFkoCZEHBvMTXwtKqvKyU32vyB3WXHRqxicOtZ QPx6LRHprSk= =i1L0 -----END PGP SIGNATURE-----