Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2022.3659 linux security update 28 July 2022 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: Debian Operating System: Debian GNU/Linux Resolution: Patch/Upgrade CVE Names: CVE-2022-34918 CVE-2022-33744 CVE-2022-33743 CVE-2022-33742 CVE-2022-33741 CVE-2022-33740 CVE-2022-26365 CVE-2022-2318 CVE-2021-33655 Original Bulletin: https://lists.debian.org/debian-security-announce/2022/msg00160.html Comment: CVSS (Max): 7.8* CVE-2022-34918 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: [Red Hat], SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * Not all CVSS available when published - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-5191-1 security@debian.org https://www.debian.org/security/ Moritz Muehlenhoff July 26, 2022 https://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : linux CVE ID : CVE-2021-33655 CVE-2022-2318 CVE-2022-26365 CVE-2022-33740 CVE-2022-33741 CVE-2022-33742 CVE-2022-33743 CVE-2022-33744 CVE-2022-34918 Several vulnerabilities have been discovered in the Linux kernel that may lead to privilege escalation, denial of service or information leaks: CVE-2021-33655 A user with access to a framebuffer console driver could cause a memory out-of-bounds write via the FBIOPUT_VSCREENINFO ioctl. CVE-2022-2318 A use-after-free in the Amateur Radio X.25 PLP (Rose) support may result in denial of service. CVE-2022-26365 / CVE-2022-33740 / CVE-2022-33741 / CVE-2022-33742 Roger Pau Monne discovered that Xen block and network PV device frontends don't zero out memory regions before sharing them with the backend, which may result in information disclosure. Additionally it was discovered that the granularity of the grant table doesn't permit sharing less than a 4k page, which may also result in information disclosure. CVE-2022-33743 Jan Beulich discovered that incorrect memory handling in the Xen network backend may lead to denial of service. CVE-2022-33744 Oleksandr Tyshchenko discovered that ARM Xen guests can cause a denial of service to the Dom0 via paravirtual devices. CVE-2022-34918 Arthur Mongodin discovered a heap buffer overflow in the Netfilter subsystem which may result in local privilege escalation. For the stable distribution (bullseye), these problems have been fixed in version 5.10.127-2. We recommend that you upgrade your linux packages. For the detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/ Mailing list: debian-security-announce@lists.debian.org - -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEEtuYvPRKsOElcDakFEMKTtsN8TjYFAmLgSLUACgkQEMKTtsN8 TjYbNA//Yr3vv1aAt9hXCpI/r4QJRZ23CxQL1so2nBV7c5q7rMdbr42+0seQl/33 pc5dikZ79MzSxShQhHYWRYrya3alXSRmgDxe5rICnSLF8+nHRpQccGfPTFDlKLOg 4sNfvonxOUKEgfi5Rqd5FtWnhCtAX+I26lI/PnA4ciQE+VA4l6YeaxJnL42HugYw q4Y8mEprEW7aZSpcK2Nk2ixXPNwJlAssvbIHvNJsaRP4X4w18iHSI/8AYlymkvfa Eyf4vEQfKce7UQB3JoIfdJQFgX3cvz6oMXZ6q9S4i5GlK7GeWSo2NRfE3ulrlFOw tCFfVN6V9tVQtuKqNma5tn4F8FG8YLafDzC0IwLq+JswrTbs5EQ/wzJhNnkXP86J hSPpMeVmT/mBihjv6PRilOraOX8mACJSQKuWkDSc9VvZCeCUo0uc31d4/WfzaOCM rxaMBHuQW7mq/Dd6htlbbGyUjWC9Zt5Wb+GtzXIb6jUOISUagMI4lnMVgOB4Tyhl FiPp4PWz7jGVsrN/l/5JsPxhQd2wPmPC2zS2REunvXOMZxCgwOMB3aW5oJSufHTa c/f9Z86s/HFZxjwJ3mEcebAzVAvGPfg9yuiD6nEEeYSTLhTCC5UTGw4WVZHjNtxB 3yn8Ju2Nqu3NbmyAlye/Y9wAlw3nIL3dkFkRU/NgzncnuXT7oLw= =DZil - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. 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/ iQIVAwUBYuG+iskNZI30y1K9AQhiRBAAnE69SNba8rm0uQmKaA6hj8fdhEjWHL1O 6BdTuHgX7yNwZkCPs6O+CGwObiB8yKX8nOB1w2xvFJ+od9ug9N6OULWtE+3qMwsS bPxZ14CJ0LGfEdWYYJJ2/FOSmaIuzcBtzmi0wQ2Akvmyy1RZECb3wYUJFxtLNDJO OaYIJofEQM1JaMJ6xE4JS26AzPEXrFZv5K/nwUJmU+AmAYeDd5JtPFUL3yN+b9+d ZOH5WbuIGcfUC+wX3oLLvxJvzgZZCLG/McE9QaYOxy0hvl2SFBEPtOV2DjsvsmeD iyTXiHfS3m9dZjEuqwVB2MCCE+3pUdPLD2wn6rOWwMGLefNe/yXYofGTXIcK0Kmv bWkbBJiXX2SQ72aUFd19QPISYPKSZALZxjYEnOqcLny+2V7ZQQRAxYY/grwpTdQJ 5Q5yv7X5DTau/1cL+k3QWvkcMiqTGKMhSqk56uJtYlz8c3pyjTWvEttomzwyPFmj kykFwtcZt3bJ0YuYecbwpwPVD+X3ViO6c67i9RZDQKLLppuMgpv0lADsN44psHHw VGwj9cWjOB4yZwHkbZUvFNwaGhLd5tqmQ5+7/90BFqVcCOk5G8cdMR8hOgTdrm1P O0zn8qpU3nreNg6S4UNNK7KeXy/Det4Od/sEdXV6YSCSXB29jLRZWT4zTeJrBw+C 5e8Xr4abwfI= =HiYr -----END PGP SIGNATURE-----