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HistoryAug 15, 2022 - 7:52 p.m.

[SECURITY] [DSA 5207-1] linux security update

2022-08-1519:52:20
lists.debian.org
41
debian
linux
kernel
security update
cve-2022-2585
cve-2022-2586
cve-2022-2588
cve-2022-26373
cve-2022-29900
cve-2022-29901
cve-2022-36879
cve-2022-36946
privilege escalation
denial of service
information disclosure
cpu timers
netfilter subsystem
xfrm subsystem
amd
intel

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.7

Confidence

High

EPSS

0.01

Percentile

84.1%


Debian Security Advisory DSA-5207-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
August 15, 2022 https://www.debian.org/security/faq


Package : linux
CVE ID : CVE-2022-2585 CVE-2022-2586 CVE-2022-2588 CVE-2022-26373
CVE-2022-29900 CVE-2022-29901 CVE-2022-36879 CVE-2022-36946

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.

CVE-2022-2585

A use-after-free flaw in the implementation of POSIX CPU timers may
result in denial of service or in local privilege escalation.

CVE-2022-2586

A use-after-free in the Netfilter subsystem may result in local
privilege escalation for a user with the CAP_NET_ADMIN capability in
any user or network namespace.

CVE-2022-2588

Zhenpeng Lin discovered a use-after-free flaw in the cls_route
filter implementation which may result in local privilege escalation
for a user with the CAP_NET_ADMIN capability in any user or network
namespace.

CVE-2022-26373

It was discovered that on certain processors with Intel's Enhanced
Indirect Branch Restricted Speculation (eIBRS) capabilities there
are exceptions to the documented properties in some situations,
which may result in information disclosure.

Intel's explanation of the issue can be found at
<https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/post-barrier-return-stack-buffer-predictions.html>

CVE-2022-29900

Johannes Wikner and Kaveh Razavi reported that for AMD/Hygon
processors, mis-trained branch predictions for return instructions
may allow arbitrary speculative code execution under certain
microarchitecture-dependent conditions.

A list of affected AMD CPU types can be found at
<https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1037>

CVE-2022-29901

Johannes Wikner and Kaveh Razavi reported that for Intel processors
(Intel Core generation 6, 7 and 8), protections against speculative
branch target injection attacks were insufficient in some
circumstances, which may allow arbitrary speculative code execution
under certain microarchitecture-dependent conditions.

More information can be found at
<https://www.intel.com/content/www/us/en/developer/articles/technical/software-security-guidance/advisory-guidance/return-stack-buffer-underflow.html>

CVE-2022-36879

A flaw was discovered in xfrm_expand_policies in the xfrm subsystem
which can cause a reference count to be dropped twice.

CVE-2022-36946

Domingo Dirutigliano and Nicola Guerrera reported a memory
corruption flaw in the Netfilter subsystem which may result in
denial of service.

For the stable distribution (bullseye), these problems have been fixed in
version 5.10.136-1.

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: [email protected]

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

8.7

Confidence

High

EPSS

0.01

Percentile

84.1%