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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.0223 telnet security update 19 January 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: telnet Publisher: Red Hat Operating System: Red Hat Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-10188 Reference: ESB-2022.0097 ESB-2020.2191.2 Original Bulletin: https://access.redhat.com/errata/RHSA-2022:0158 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: telnet security update Advisory ID: RHSA-2022:0158-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2022:0158 Issue date: 2022-01-18 CVE Names: CVE-2020-10188 ===================================================================== 1. Summary: An update for telnet is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 7.7) - x86_64 Red Hat Enterprise Linux Server E4S (v. 7.7) - ppc64le, x86_64 Red Hat Enterprise Linux Server TUS (v. 7.7) - x86_64 3. Description: Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default. Security Fix(es): * telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code (CVE-2020-10188) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code 6. Package List: Red Hat Enterprise Linux Server AUS (v. 7.7): Source: telnet-0.17-65.el7_7.src.rpm x86_64: telnet-0.17-65.el7_7.x86_64.rpm telnet-debuginfo-0.17-65.el7_7.x86_64.rpm telnet-server-0.17-65.el7_7.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.7): Source: telnet-0.17-65.el7_7.src.rpm ppc64le: telnet-0.17-65.el7_7.ppc64le.rpm telnet-debuginfo-0.17-65.el7_7.ppc64le.rpm telnet-server-0.17-65.el7_7.ppc64le.rpm x86_64: telnet-0.17-65.el7_7.x86_64.rpm telnet-debuginfo-0.17-65.el7_7.x86_64.rpm telnet-server-0.17-65.el7_7.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.7): Source: telnet-0.17-65.el7_7.src.rpm x86_64: telnet-0.17-65.el7_7.x86_64.rpm telnet-debuginfo-0.17-65.el7_7.x86_64.rpm telnet-server-0.17-65.el7_7.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2020-10188 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2022 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYeaujdzjgjWX9erEAQh0OQ//QWcGBoyd/LZDkQDsecBycQdfleB7T1k6 WFr0s9+FmswY3ktsVqdsAjAccOx1jgpoxljybLrf3Ocr6bZuZyfM3S2AooTrx/hc Gvd3wAo+Ivb3CuDzsBb6w7jW2GdF2m8HyDcSDYgnAIgMyc8c4kFRRBcexkj9Wr/q sF5orQHJ1vhDLk2Ie5/iSyNmqmbxtvQKPFNwmRQKnfTVB8vKPYxZQgEqSwTWxIQs WkJo09ixkWmp0SQWMETqCcayj7tlelZUn8TV5rd0RjDQ0JbBsPnUf9ngEo7RB77I paX4NrPehHkDZ9bEfkGswek+p+0nahfNIDGImYkjIlE5XyxBJQ2wohYioRqD9+2S z/NLnHkdbNQjeqgfsQvPfJ7QZwDUIAAA7BwTJUXK03viyLcDcFStCV+vP+nCdBVj 0a5V5YiGDIv3o1j8PN7ezytNw0//i7tei78jYOe6DFJms6USKjyS23mmKkF7Xbtx mxuMLXRQgfRrQYZQ+ayD00VwKYN3eQqWKWwF8/Nt1njTF2Sy1JLRLklMQW6DPD6T pR8gQL6D9UeilTu+brOvdH8o4f0F4HBJPleNnPn+mKsE2EA/tflGdJFA2nHt/NOi C3HXGBmw8xpoBrAUxV9aovfKRLO71bgnQMH54RIFf9y4yMJC/nj4euapBajH0twi RjdtVdCFVjs= =FWn0 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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