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AUSCERT External Security Bulletin Redistribution
ESB-2023.3996
linux security update
17 July 2023
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AusCERT Security Bulletin Summary
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Product: linux
Publisher: Debian
Operating System: Debian GNU/Linux
Resolution: Patch/Upgrade
CVE Names: CVE-2023-35001 CVE-2023-31248 CVE-2023-2156
Original Bulletin:
https://lists.debian.org/debian-security-announce/2023/msg00145.html
Comment: CVSS (Max): 7.8 CVE-2023-35001 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: NVD
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Debian Security Advisory DSA-5453-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
July 16, 2023 https://www.debian.org/security/faq
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Package : linux
CVE ID : CVE-2023-2156 CVE-2023-31248 CVE-2023-35001
Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.
CVE-2023-2156
It was discovered that a flaw in the handling of the RPL protocol
may allow an unauthenticated remote attacker to cause a denial of
service if RPL is enabled (not by default in Debian).
CVE-2023-31248
Mingi Cho discovered a use-after-free flaw in the Netfilter
nf_tables implementation when using nft_chain_lookup_byid, which may
result in local privilege escalation for a user with the
CAP_NET_ADMIN capability in any user or network namespace.
CVE-2023-35001
Tanguy DUBROCA discovered an out-of-bounds reads and write flaw in
the Netfilter nf_tables implementation when processing an
nft_byteorder expression, which may result in local privilege
escalation for a user with the CAP_NET_ADMIN capability in any user
or network namespace.
For the oldstable distribution (bullseye), these problems have been fixed
in version 5.10.179-2.
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]
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The University of Queensland
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