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HistoryOct 28, 2020 - 2:53 p.m.

[SECURITY] [DLA 2417-1] linux-4.19 security update

2020-10-2814:53:23
lists.debian.org
20

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

AV:N/AC:M/Au:S/C:P/I:P/A:C

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.9

Confidence

High

EPSS

0.008

Percentile

81.7%


Debian LTS Advisory DLA-2417-1 [email protected]
https://www.debian.org/lts/security/ Ben Hutchings
October 27, 2020 https://wiki.debian.org/LTS

Package : linux-4.19
Version : 4.19.152-1~deb9u1
CVE ID : CVE-2020-12351 CVE-2020-12352 CVE-2020-25211 CVE-2020-25643
CVE-2020-25645
Debian Bug : 908712

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

CVE-2020-12351

Andy Nguyen discovered a flaw in the Bluetooth implementation in the
way L2CAP packets with A2MP CID are handled. A remote attacker in
short distance knowing the victim's Bluetooth device address can
send a malicious l2cap packet and cause a denial of service or
possibly arbitrary code execution with kernel privileges.

CVE-2020-12352

Andy Nguyen discovered a flaw in the Bluetooth implementation. Stack
memory is not properly initialised when handling certain AMP
packets. A remote attacker in short distance knowing the victim's
Bluetooth device address address can retrieve kernel stack
information.

CVE-2020-25211

A flaw was discovered in netfilter subsystem. A local attacker
able to inject conntrack Netlink configuration can cause a denial
of service.

CVE-2020-25643

ChenNan Of Chaitin Security Research Lab discovered a flaw in the
hdlc_ppp module. Improper input validation in the ppp_cp_parse_cr()
function may lead to memory corruption and information disclosure.

CVE-2020-25645

A flaw was discovered in the interface driver for GENEVE
encapsulated traffic when combined with IPsec. If IPsec is
configured to encrypt traffic for the specific UDP port used by the
GENEVE tunnel, tunneled data isn't correctly routed over the
encrypted link and sent unencrypted instead.

For Debian 9 stretch, these problems have been fixed in version
4.19.152-1~deb9u1.

We recommend that you upgrade your linux-4.19 packages.

For the detailed security status of linux-4.19 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/linux-4.19

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


Ben Hutchings - Debian developer, member of kernel, installer and LTS teams
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CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

COMPLETE

AV:N/AC:M/Au:S/C:P/I:P/A:C

CVSS3

8.8

Attack Vector

ADJACENT

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.9

Confidence

High

EPSS

0.008

Percentile

81.7%