AlmaLinux 8 : container-tools:4.0 (ALSA-2024:0748)

high Nessus Plugin ID 190356


The remote AlmaLinux host is missing one or more security updates.


The remote AlmaLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2024:0748 advisory.

- A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small. (CVE-2023-39326)

- Before Go 1.20, the RSA based TLS key exchanges used the math/big library, which is not constant time. RSA blinding was applied to prevent timing attacks, but analysis shows this may not have been fully effective.
In particular it appears as if the removal of PKCS#1 padding may leak timing information, which in turn could be used to recover session key bits. In Go 1.20, the crypto/tls library switched to a fully constant time RSA implementation, which we do not believe exhibits any timing side channels. (CVE-2023-45287)

- runc is a CLI tool for spawning and running containers on Linux according to the OCI specification. In runc 1.1.11 and earlier, due to an internal file descriptor leak, an attacker could cause a newly-spawned container process (from runc exec) to have a working directory in the host filesystem namespace, allowing for a container escape by giving access to the host filesystem (attack 2). The same attack could be used by a malicious image to allow a container process to gain access to the host filesystem through runc run (attack 1). Variants of attacks 1 and 2 could be also be used to overwrite semi-arbitrary host binaries, allowing for complete container escapes (attack 3a and attack 3b). runc 1.1.12 includes patches for this issue. (CVE-2024-21626)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Update the affected packages.

See Also

Plugin Details

Severity: High

ID: 190356

File Name: alma_linux_ALSA-2024-0748.nasl

Version: 1.3

Type: local

Published: 2/9/2024

Updated: 3/8/2024

Supported Sensors: Nessus

Risk Information


Risk Factor: Critical

Score: 10.0


Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2023-45287


Risk Factor: High

Base Score: 8.6

Temporal Score: 8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

CVSS Score Source: CVE-2024-21626

Vulnerability Information

CPE: p-cpe:/a:alma:linux:aardvark-dns, p-cpe:/a:alma:linux:buildah, p-cpe:/a:alma:linux:buildah-tests, p-cpe:/a:alma:linux:cockpit-podman, p-cpe:/a:alma:linux:conmon, p-cpe:/a:alma:linux:container-selinux, p-cpe:/a:alma:linux:containernetworking-plugins, p-cpe:/a:alma:linux:containers-common, p-cpe:/a:alma:linux:crit, p-cpe:/a:alma:linux:criu, p-cpe:/a:alma:linux:criu-devel, p-cpe:/a:alma:linux:criu-libs, p-cpe:/a:alma:linux:crun, p-cpe:/a:alma:linux:fuse-overlayfs, p-cpe:/a:alma:linux:libslirp, p-cpe:/a:alma:linux:libslirp-devel, p-cpe:/a:alma:linux:netavark, p-cpe:/a:alma:linux:oci-seccomp-bpf-hook, p-cpe:/a:alma:linux:podman, p-cpe:/a:alma:linux:podman-catatonit, p-cpe:/a:alma:linux:podman-docker, p-cpe:/a:alma:linux:podman-gvproxy, p-cpe:/a:alma:linux:podman-plugins, p-cpe:/a:alma:linux:podman-remote, p-cpe:/a:alma:linux:podman-tests, p-cpe:/a:alma:linux:python3-criu, p-cpe:/a:alma:linux:python3-podman, p-cpe:/a:alma:linux:runc, p-cpe:/a:alma:linux:skopeo, p-cpe:/a:alma:linux:skopeo-tests, p-cpe:/a:alma:linux:slirp4netns, p-cpe:/a:alma:linux:toolbox, p-cpe:/a:alma:linux:toolbox-tests, p-cpe:/a:alma:linux:udica, cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::supplementary

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2/8/2024

Vulnerability Publication Date: 12/5/2023

Exploitable With

Metasploit (runc (docker) File Descriptor Leak Privilege Escalation)

Reference Information

CVE: CVE-2023-39326, CVE-2023-45287, CVE-2024-21626

CWE: 200, 208, 400

IAVB: 2023-B-0096-S