- -------------------------------------------------------------------------
Debian Security Advisory DSA-5453-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
July 16, 2023                         https://www.debian.org/security/faq
- -------------------------------------------------------------------------

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/source-package/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: debian-security-announce@lists.debian.org

Debian: DSA-5453-1: linux security update

July 16, 2023
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks

Summary

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/source-package/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: debian-security-announce@lists.debian.org

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

Related News