Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.0959 Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP4) 18 March 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: linux kernel Publisher: SUSE Operating System: SUSE Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Increased Privileges -- Existing Account Overwrite Arbitrary Files -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-3347 CVE-2020-29368 CVE-2020-28374 CVE-2020-27786 Reference: ESB-2021.0955 Original Bulletin: https://www.suse.com/support/update/announcement/2021/suse-su-20210823-1 - --------------------------BEGIN INCLUDED TEXT-------------------- SUSE Security Update: Security update for the Linux Kernel (Live Patch 16 for SLE 12 SP4) ______________________________________________________________________________ Announcement ID: SUSE-SU-2021:0823-1 Rating: important References: #1178684 #1179616 #1179664 #1181553 #1182108 #1182468 Cross-References: CVE-2020-27786 CVE-2020-28374 CVE-2020-29368 CVE-2021-3347 Affected Products: SUSE Linux Enterprise Live Patching 12-SP4 ______________________________________________________________________________ An update that solves four vulnerabilities and has two fixes is now available. Description: This update for the Linux Kernel 4.12.14-95_60 fixes several issues. The following security issues were fixed: o CVE-2020-29368: Fixed an issue in copy-on-write implementation which could have granted unintended write access because of a race condition in a THP mapcount check (bsc#1179664). o Fixed an issue where NFS client filesystems got unmounted on fail-over (bsc #1182468). o Fixed an issue where NFS client hanged on write errors (bsc#1182108). o CVE-2021-3347: Fixed a use-after-free in the PI futexes during fault handling, allowing local users to execute code in the kernel (bsc#1181553). o CVE-2020-27786: Fixed a potential user after free which could have led to memory corruption or privilege escalation (bsc#1179616). o CVE-2020-28374: Fixed insufficient identifier checking in the LIO SCSI target code which could have been used by remote attackers to read or write files via directory traversal in an XCOPY request (bsc#1178684). Patch Instructions: To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: o SUSE Linux Enterprise Live Patching 12-SP4: zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2021-823=1 SUSE-SLE-Live-Patching-12-SP4-2021-824=1 SUSE-SLE-Live-Patching-12-SP4-2021-825=1 Package List: o SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64): kgraft-patch-4_12_14-95_54-default-7-2.2 kgraft-patch-4_12_14-95_57-default-7-2.2 kgraft-patch-4_12_14-95_60-default-6-2.2 References: o https://www.suse.com/security/cve/CVE-2020-27786.html o https://www.suse.com/security/cve/CVE-2020-28374.html o https://www.suse.com/security/cve/CVE-2020-29368.html o https://www.suse.com/security/cve/CVE-2021-3347.html o https://bugzilla.suse.com/1178684 o https://bugzilla.suse.com/1179616 o https://bugzilla.suse.com/1179664 o https://bugzilla.suse.com/1181553 o https://bugzilla.suse.com/1182108 o https://bugzilla.suse.com/1182468 - --------------------------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: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYFLxKuNLKJtyKPYoAQgNexAAnYptDQvvmZN7m94tMZGr2QNONQ9y9Tcc DjXUmKMurXtn2JTnGNPOUkN19TCPp3ugWwj4koNqVpK40il/Vr/7cCiOu1VH16WM 6iYxbHeqOdvVvQu9/Ixxuh2K/MbrRYN08aJZ0WyKvZ2TQI7Wvsb6J/0Ojtu3oUoU AmllbmX7YHzj/l6nSPDrKoJaRa4ef7SnLViYEsl8lIvd7wWWc6uoFSkiSoof7jPk YX+J3Atz2xazcitzvS+aI3s7qikNejNgNDZOpBS6lUKPtFIYpzhXUvB1Dy3Yy+yi Ub7OXMYfR4PqgnVBBoI/pBpGAsRs/wlv7s51731mOR2ac5iDRn6IHNkYJ1t5pIQd 0a9ud+TCnTWzwmpqiXuRqi5sKpni4yewj4KDNeRrBwcsK+wNR/V/c/8RAQ1BfK8s TTPv06/pVs0pfBo8A+C1s0K6UxndczbNNNPmr0GwdQ8jid7EUVMOzNEJiYi+H42b e03WxArGi1ES/Lx40lwJF36Uu42z+fLUxpWcNNYPMf42OTx/hEFCgMt5tE18aSAd iF+kYzs8xROytk2Gt4PXLE6PqOcTnszpks+kWoPcolENL/pDTq6lP8jjrkpUFGev WIYM6Do0/NYSQKz5n8GZd9irg79Vbf03J7iXi2d/zvb80m2eueHe4CGw6y4e7Kdy 31VXeH9z3so= =OjTO -----END PGP SIGNATURE-----