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Ubuntu Security Notice USN-6699-1
Posted Mar 19, 2024
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6699-1 - Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service. It was discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel did not properly handle network packets in certain conditions, leading to a use after free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-30456, CVE-2023-4921, CVE-2024-24855
SHA-256 | 741ef8ab62e9bd28635067dd14c486e47aa528483cb49a6add77447f74408506
Ubuntu Security Notice USN-6396-3
Posted Oct 17, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-3 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 8232218ebf9db1d697b359db5fb1b03f5377448ae5c7c7556b00fe639696885f
Ubuntu Security Notice USN-6396-2
Posted Oct 5, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-2 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 70922139c6b034f316eb5edab38f72e40e1c058b73dbdd7a944c8bf477ad69b9
Ubuntu Security Notice USN-6396-1
Posted Sep 27, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 04f83418015d33b3205d491de8dc8ecd62f2ec112f80bc56af999e0c615748fa
Ubuntu Security Notice USN-6385-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6385-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-4269, CVE-2023-0458, CVE-2023-1075, CVE-2023-1076, CVE-2023-1206, CVE-2023-1380, CVE-2023-1611, CVE-2023-2002, CVE-2023-20593, CVE-2023-2162, CVE-2023-2163, CVE-2023-2235, CVE-2023-2269
SHA-256 | 397aabee4166381c7e45af794aab5e2f5ce22baf3c0ee09c03c9b743ea1a8b5f
Kernel Live Patch Security Notice LSN-0096-1
Posted Jul 26, 2023
Authored by Benjamin M. Romer

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly expose sensitive information. Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service (guest crash). Various other issues were also addressed.

tags | advisory, denial of service, x86, kernel
systems | linux
advisories | CVE-2023-1380, CVE-2023-30456, CVE-2023-31248, CVE-2023-31436, CVE-2023-35001
SHA-256 | f71c9e71db4bb6c2c048a5f92cbb08cec9d660d843f677df4000f97384e9be37
Ubuntu Security Notice USN-6133-1
Posted Jun 2, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6133-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for this CVE, kernel support for the TCINDEX classifier has been removed. It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-1829, CVE-2023-1872, CVE-2023-20938, CVE-2023-2162, CVE-2023-32269
SHA-256 | 8dbd60b85d91d8541dce5a452bbd26cd2c78f4622dc2154acc6b4aac98331f41
Ubuntu Security Notice USN-6124-1
Posted May 31, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6124-1 - Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-3586, CVE-2022-4139, CVE-2023-1670, CVE-2023-2612, CVE-2023-30456, CVE-2023-32233
SHA-256 | 488019825a52767118c79091984feba06bc2c22c68ba9d70b20568ab55b6c89d
Ubuntu Security Notice USN-6123-1
Posted May 31, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6123-1 - Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service.

tags | advisory, denial of service, arbitrary, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-1670, CVE-2023-2612, CVE-2023-26606, CVE-2023-30456, CVE-2023-32233
SHA-256 | df56b82df331c1c081d299856c697c2da2c9d8d15ef5390e9143271062bfb935
Ubuntu Security Notice USN-6096-1
Posted May 23, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6096-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-36280, CVE-2022-3707, CVE-2022-4129, CVE-2022-4842, CVE-2022-48423, CVE-2022-48424, CVE-2023-0210, CVE-2023-0394, CVE-2023-0458, CVE-2023-0459, CVE-2023-1073, CVE-2023-1074, CVE-2023-1075
SHA-256 | 34cc30ebdf58924fb1b0c1d2ffdb4157e4f644bf5821397bbd37680bea54a1e2
Ubuntu Security Notice USN-6095-1
Posted May 23, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6095-1 - Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information. Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel did not properly initialize some data structures. A local attacker could use this to expose sensitive information.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0459, CVE-2023-1118, CVE-2023-1513, CVE-2023-2162, CVE-2023-32269
SHA-256 | 902ea7575b25bbc81e98afa096da148d6b4dd72ed49f98e4a167376dcb1aaef5
Ubuntu Security Notice USN-6092-1
Posted May 19, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6092-1 - Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information. Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel did not properly initialize some data structures. A local attacker could use this to expose sensitive information.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0459, CVE-2023-1118, CVE-2023-1513, CVE-2023-2162, CVE-2023-32269
SHA-256 | d7e5b9e74183122ef1a06d8fb7224fe2527cfc66abe214adacfb74fd2fde6a92
Ubuntu Security Notice USN-6091-1
Posted May 19, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6091-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-36280, CVE-2022-3707, CVE-2022-4129, CVE-2022-4842, CVE-2022-48423, CVE-2022-48424, CVE-2023-0210, CVE-2023-0394, CVE-2023-0458, CVE-2023-0459, CVE-2023-1073, CVE-2023-1074, CVE-2023-1075
SHA-256 | 651ba1a89cf9b5d5fcfc6ec7f0f13b73b41225a33fc642efba219a7eab3cd1ba
Ubuntu Security Notice USN-6090-1
Posted May 19, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6090-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-20938, CVE-2023-2162, CVE-2023-32269
SHA-256 | addcf4276faba9380882f43f0aa2701ba3c30a4872d00370de9952686c9ccc54
Ubuntu Security Notice USN-6085-1
Posted May 18, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6085-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-20938, CVE-2023-2162, CVE-2023-32269
SHA-256 | aa3210f987aad288eceb4d47738fefdeeaba45b30f0086b998487487e95379e5
Ubuntu Security Notice USN-6084-1
Posted May 18, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6084-1 - Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information. Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel did not properly initialize some data structures. A local attacker could use this to expose sensitive information.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0459, CVE-2023-1118, CVE-2023-1513, CVE-2023-2162, CVE-2023-32269
SHA-256 | aff7252874c1a2288365562741dd0fcaeace1fb8d18c5af9a19d4e635dc0a359
Ubuntu Security Notice USN-6080-1
Posted May 16, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6080-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Zheng Wang discovered that the Intel i915 graphics driver in the Linux kernel did not properly handle certain error conditions, leading to a double-free. A local attacker could possibly use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-3707, CVE-2023-0459, CVE-2023-1075, CVE-2023-1078, CVE-2023-1118, CVE-2023-1513, CVE-2023-20938, CVE-2023-2162, CVE-2023-32269
SHA-256 | 93ed89539e4f6a0904390e085d7eac73b19389661a8b7ebc0e5c39f0a474ec7a
Ubuntu Security Notice USN-6079-1
Posted May 16, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6079-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Ziming Zhang discovered that the VMware Virtual GPU DRM driver in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-36280, CVE-2022-3707, CVE-2022-4129, CVE-2022-4842, CVE-2022-48423, CVE-2022-48424, CVE-2023-0210, CVE-2023-0394, CVE-2023-0458, CVE-2023-0459, CVE-2023-1073, CVE-2023-1074, CVE-2023-1075
SHA-256 | c55226f642efc261a275c77b949560f51ecbee738f4b1ae410a64e9ef5623271
Ubuntu Security Notice USN-6081-1
Posted May 16, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6081-1 - Jordy Zomer and Alexandra Sandulescu discovered that the Linux kernel did not properly implement speculative execution barriers in usercopy functions in certain situations. A local attacker could use this to expose sensitive information. Xingyuan Mo discovered that the x86 KVM implementation in the Linux kernel did not properly initialize some data structures. A local attacker could use this to expose sensitive information.

tags | advisory, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-0459, CVE-2023-1118, CVE-2023-1513, CVE-2023-2162, CVE-2023-32269
SHA-256 | 42559a1aa2d8343ea6e84d32be754ce75354fbe046e2bd5e07f19747c9361b5a
Linux/x86 Polymorphic Netcat Shellcode
Posted Apr 3, 2023
Authored by Eduardo Silva

92 bytes small Linux/x86 polymorphic nc -lvve/bin/sh -p13377 shellcode.

tags | x86, shellcode
systems | linux
SHA-256 | 05c38fb813c23c380d6dd1aa3c46be607e0be4322b049a9a2b1ada74e5f3ebc6
Windows/x86 Create Administrator User Shellcode
Posted Apr 3, 2023
Authored by Xavi Beltran

373 bytes small Windows/x86 create administrator user dynamic PEB and EDT method null-free shellcode.

tags | x86, shellcode
systems | windows
SHA-256 | bc0be9163bb975df26f17d6f2ca0289dfedc8e8f35a9bd95e0682e7123f4061e
Ubuntu Security Notice USN-5729-2
Posted Nov 21, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5729-2 - It was discovered that a race condition existed in the instruction emulator of the Linux kernel on Arm 64-bit systems. A local attacker could use this to cause a denial of service. Hsin-Wei Hung discovered that the BPF subsystem in the Linux kernel contained an out-of-bounds read vulnerability in the x86 JIT compiler. A local attacker could possibly use this to cause a denial of service or expose sensitive information.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-20422, CVE-2022-2905, CVE-2022-2978, CVE-2022-3028, CVE-2022-3625, CVE-2022-3635, CVE-2022-39190, CVE-2022-40768
SHA-256 | 37ac683956be1298d59db7946f6bc8b7d7e2c0e7a850719e8ead2f51fc670c14
Ubuntu Security Notice USN-5729-1
Posted Nov 17, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5729-1 - It was discovered that a race condition existed in the instruction emulator of the Linux kernel on Arm 64-bit systems. A local attacker could use this to cause a denial of service. Hsin-Wei Hung discovered that the BPF subsystem in the Linux kernel contained an out-of-bounds read vulnerability in the x86 JIT compiler. A local attacker could possibly use this to cause a denial of service or expose sensitive information.

tags | advisory, denial of service, x86, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-20422, CVE-2022-2905, CVE-2022-2978, CVE-2022-3028, CVE-2022-3625, CVE-2022-3635, CVE-2022-39190, CVE-2022-40768
SHA-256 | 2ed9de86da2c1e7cc0b4f8970c86b427aa7bf63dcea72f209cebdcce6cd60b19
monomorph MD5-Monomorphic Shellcode Packer
Posted Sep 29, 2022
Authored by Retr0id | Site github.com

This tool packs up to 4KB of compressed shellcode into an executable binary, near-instantly. The output file will always have the same MD5 hash: 3cebbe60d91ce760409bbe513593e401. Currently, only Linux x86-64 is supported. It would be trivial to port this technique to other platforms, although each version would end up with a different MD5.

tags | tool, x86, shellcode
systems | linux, unix
SHA-256 | 1401bc41094d6c399524f490182dedc77295916d73ec25d4c7ea3751f754d6cc
Ubuntu Security Notice USN-5502-1
Posted Jul 6, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5502-1 - Alex Chernyakhovsky discovered that OpenSSL incorrectly handled AES OCB mode when using the AES-NI assembly optimized implementation on 32-bit x86 platforms. A remote attacker could possibly use this issue to obtain sensitive information.

tags | advisory, remote, x86
systems | linux, ubuntu
advisories | CVE-2022-2097
SHA-256 | b7685024ea08064a48df0cc02c966bbdef3aaaac3fe59662c6702428963a6223
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