ID de Prueba:	1.3.6.1.4.1.25623.1.1.10.2021.0258
Categoría:	Mageia Linux Local Security Checks
Título:	Mageia: Security Advisory (MGASA-2021-0258)
Resumen:	The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0258 advisory.
Descripción:	Summary: The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0258 advisory. Vulnerability Insight: This kernel-linus update is based on upstream 5.10.43 and fixes at least the following security issues: The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that received fragments be cleared from memory after (re)connecting to a network. Under the right circumstances, when another device sends fragmented frames encrypted using WEP, CCMP, or GCMP, this can be abused to inject arbitrary network packets and/or exfiltrate user data (CVE-2020-24586). The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that all fragments of a frame are encrypted under the same key. An adversary can abuse this to decrypt selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP encryption key is periodically renewed (CVE-2020-24587). The 802.11 standard that underpins Wi-Fi Protected Access (WPA, WPA2, and WPA3) and Wired Equivalent Privacy (WEP) doesn't require that the A-MSDU flag in the plaintext QoS header field is authenticated. Against devices that support receiving non-SSP A-MSDU frames (which is mandatory as part of 802.11n), an adversary can abuse this to inject arbitrary network packets (CVE-2020-24588). An issue was discovered in the kernel. An Access Point (AP) forwards EAPOL frames to other clients even though the sender has not yet successfully authenticated to the AP. This might be abused in projected Wi-Fi networks to launch denial-of-service attacks against connected clients and makes it easier to exploit other vulnerabilities in connected clients (CVE-2020-26139). An issue was discovered in the kernel ath10k driver. The Wi-Fi implementation does not verify the Message Integrity Check (authenticity) of fragmented TKIP frames. An adversary can abuse this to inject and possibly decrypt packets in WPA or WPA2 networks that support the TKIP data-confidentiality protocol (CVE-2020-26141). An issue was discovered in the kernel ath10k driver. The WEP, WPA, WPA2, and WPA3 implementations accept second (or subsequent) broadcast fragments even when sent in plaintext and process them as full unfragmented frames. An adversary can abuse this to inject arbitrary network packets independent of the network configuration (CVE-2020-26145). An issue was discovered in the Linux kernel 5.8.9. The WEP, WPA, WPA2, and WPA3 implementations reassemble fragments even though some of them were sent in plaintext. This vulnerability can be abused to inject packets and/ or exfiltrate selected fragments when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used (CVE-2020-26147). A double-free memory corruption in the Linux kernel HCI device initialization subsystem was found in the way user attach malicious HCI TTY Bluetooth device. A local user could use this flaw ... [Please see the references for more information on the vulnerabilities] Affected Software/OS: 'kernel-linus' package(s) on Mageia 7, Mageia 8. Solution: Please install the updated package(s). CVSS Score: 6.9 CVSS Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Referencia Cruzada:	Common Vulnerability Exposure (CVE) ID: CVE-2020-24586 Cisco Security Advisory: 20210511 Multiple Vulnerabilities in Frame Aggregation and Fragmentation Implementations of 802.11 Specification Affecting Cisco Products: May 2021 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wifi-faf-22epcEWu https://github.com/vanhoefm/fragattacks/blob/master/SUMMARY.md https://www.arista.com/en/support/advisories-notices/security-advisories/12602-security-advisory-63 https://www.fragattacks.com https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2023/04/msg00002.html http://www.openwall.com/lists/oss-security/2021/05/11/12 Common Vulnerability Exposure (CVE) ID: CVE-2020-24587 Common Vulnerability Exposure (CVE) ID: CVE-2020-24588 Common Vulnerability Exposure (CVE) ID: CVE-2020-26139 Common Vulnerability Exposure (CVE) ID: CVE-2020-26141 Common Vulnerability Exposure (CVE) ID: CVE-2020-26145 Common Vulnerability Exposure (CVE) ID: CVE-2020-26147 Common Vulnerability Exposure (CVE) ID: CVE-2021-28691 https://security.gentoo.org/glsa/202107-30 https://xenbits.xenproject.org/xsa/advisory-374.txt Common Vulnerability Exposure (CVE) ID: CVE-2021-3564 [debian-lts-announce] 20210623 [SECURITY] [DLA 2689-1] linux security update [debian-lts-announce] 20210623 [SECURITY] [DLA 2690-1] linux-4.19 security update [oss-security] 20210525 CVE-2021-3564 Linux Bluetooth device initialization implementation bug http://www.openwall.com/lists/oss-security/2021/05/25/1 [oss-security] 20210601 Re: CVE-2021-3564 Linux Bluetooth device initialization implementation bug http://www.openwall.com/lists/oss-security/2021/06/01/2 https://bugzilla.redhat.com/show_bug.cgi?id=1964139 https://www.openwall.com/lists/oss-security/2021/05/25/1 Common Vulnerability Exposure (CVE) ID: CVE-2021-3573 https://bugzilla.redhat.com/show_bug.cgi?id=1966578 https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth.git/commit/?id=e305509e678b3a4af2b3cfd410f409f7cdaabb52 https://www.openwall.com/lists/oss-security/2021/06/08/2 http://www.openwall.com/lists/oss-security/2023/07/02/1 Common Vulnerability Exposure (CVE) ID: CVE-2021-38208 https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10 https://github.com/torvalds/linux/commit/4ac06a1e013cf5fdd963317ffd3b968560f33bba http://www.openwall.com/lists/oss-security/2021/08/17/1 http://www.openwall.com/lists/oss-security/2021/08/17/2 http://www.openwall.com/lists/oss-security/2021/08/24/2
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