Описание
Security update for grub2
This update for grub2 fixes the following issues:
Security fixes and hardenings for boothole 3 / boothole 2022 (bsc#1198581)
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CVE-2021-3695: Fixed that a crafted PNG grayscale image could lead to out-of-bounds write in heap (bsc#1191184)
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CVE-2021-3696: Fixed that a crafted PNG image could lead to out-of-bound write during huffman table handling (bsc#1191185)
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CVE-2021-3697: Fixed that a crafted JPEG image could lead to buffer underflow write in the heap (bsc#1191186)
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CVE-2022-28733: Fixed fragmentation math in net/ip (bsc#1198460)
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CVE-2022-28734: Fixed an out-of-bound write for split http headers (bsc#1198493)
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CVE-2022-28736: Fixed a use-after-free in chainloader command (bsc#1198496)
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Update SBAT security contact (bsc#1193282)
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Bump grub's SBAT generation to 2
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Use boot disks in OpenFirmware, fixing regression caused when the root LV is completely in the boot LUN (bsc#1197948)
Список пакетов
Image SLES12-SP4-SAP-Azure-LI-BYOS-Production
Image SLES12-SP4-SAP-Azure-VLI-BYOS-Production
Image SLES12-SP5-Azure-BYOS
Image SLES12-SP5-Azure-Basic-On-Demand
Image SLES12-SP5-Azure-HPC-BYOS
Image SLES12-SP5-Azure-HPC-On-Demand
Image SLES12-SP5-Azure-SAP-BYOS
Image SLES12-SP5-Azure-SAP-On-Demand
Image SLES12-SP5-Azure-Standard-On-Demand
Image SLES12-SP5-EC2-BYOS
Image SLES12-SP5-EC2-ECS-On-Demand
Image SLES12-SP5-EC2-On-Demand
Image SLES12-SP5-EC2-SAP-BYOS
Image SLES12-SP5-EC2-SAP-On-Demand
Image SLES12-SP5-GCE-BYOS
Image SLES12-SP5-GCE-On-Demand
Image SLES12-SP5-GCE-SAP-BYOS
Image SLES12-SP5-GCE-SAP-On-Demand
Image SLES12-SP5-SAP-Azure-LI-BYOS-Production
Image SLES12-SP5-SAP-Azure-VLI-BYOS-Production
SUSE Linux Enterprise Server 12 SP4-LTSS
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server for SAP Applications 12 SP4
SUSE Linux Enterprise Server for SAP Applications 12 SP5
SUSE OpenStack Cloud 9
SUSE OpenStack Cloud Crowbar 9
Ссылки
- Link for SUSE-SU-2022:2038-1
- E-Mail link for SUSE-SU-2022:2038-1
- SUSE Security Ratings
- SUSE Bug 1191184
- SUSE Bug 1191185
- SUSE Bug 1191186
- SUSE Bug 1193282
- SUSE Bug 1197948
- SUSE Bug 1198460
- SUSE Bug 1198493
- SUSE Bug 1198496
- SUSE Bug 1198581
- SUSE CVE CVE-2021-3695 page
- SUSE CVE CVE-2021-3696 page
- SUSE CVE CVE-2021-3697 page
- SUSE CVE CVE-2022-28733 page
- SUSE CVE CVE-2022-28734 page
- SUSE CVE CVE-2022-28736 page
Описание
A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.
Затронутые продукты
Ссылки
- CVE-2021-3695
- SUSE Bug 1191184
- SUSE Bug 1203445
- SUSE Bug 1205057
- SUSE Bug 1227915
Описание
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
Затронутые продукты
Ссылки
- CVE-2021-3696
- SUSE Bug 1191185
Описание
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
Затронутые продукты
Ссылки
- CVE-2021-3697
- SUSE Bug 1191186
- SUSE Bug 1203445
- SUSE Bug 1205057
Описание
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
Затронутые продукты
Ссылки
- CVE-2022-28733
- SUSE Bug 1198460
- SUSE Bug 1203445
- SUSE Bug 1205057
- SUSE Bug 1227915
Описание
Out-of-bounds write when handling split HTTP headers; When handling split HTTP headers, GRUB2 HTTP code accidentally moves its internal data buffer point by one position. This can lead to a out-of-bound write further when parsing the HTTP request, writing a NULL byte past the buffer. It's conceivable that an attacker controlled set of packets can lead to corruption of the GRUB2's internal memory metadata.
Затронутые продукты
Ссылки
- CVE-2022-28734
- SUSE Bug 1198493
- SUSE Bug 1203445
Описание
There's a use-after-free vulnerability in grub_cmd_chainloader() function; The chainloader command is used to boot up operating systems that doesn't support multiboot and do not have direct support from GRUB2. When executing chainloader more than once a use-after-free vulnerability is triggered. If an attacker can control the GRUB2's memory allocation pattern sensitive data may be exposed and arbitrary code execution can be achieved.
Затронутые продукты
Ссылки
- CVE-2022-28736
- SUSE Bug 1198496
- SUSE Bug 1203445
- SUSE Bug 1205057