Sicherheitslücken in lxd · Seite 4

Incus container image templating arbitrary host file read and write

Incus is a system container and virtual machine manager. Versions 6.21.0 and below allow a user with the ability to launch a container with a custom image (e.g a member of the ‘incus’ group) to use directory traversal or symbolic links in the templating functionality to achieve host arbitrary file read, and host arbitrary file write. This ultimately results in arbitrary command execution on the host. When using an image with a metadata.yaml containing templates, both the source and target paths are not checked for symbolic links or directory traversal. This can also be exploited in IncusOS. A fix is planned for versions 6.0.6 and 6.21.0, but

Incus container environment configuration newline injection

Incus is a system container and virtual machine manager. In versions 6.20.0 and below, a user with the ability to launch a container with a custom YAML configuration (e.g a member of the ‘incus’ group) can create an environment variable containing newlines, which can be used to add additional configuration items in the container’s lxc.conf due to newline injection. This can allow adding arbitrary lifecycle hooks, ultimately resulting in arbitrary command execution on the host. Exploiting this issue on IncusOS requires a slight modification of the payload to change to a different writable directory for the validation step (e.g /tmp). This can

Malformed constraint may cause denial of service in golang.org/x/crypto/ssh/agent

SSH Agent servers do not validate the size of messages when processing new identity requests, which may cause the program to panic if the message is malformed due to an out of bounds read.

Unbounded memory consumption in golang.org/x/crypto/ssh

SSH servers parsing GSSAPI authentication requests do not validate the number of mechanisms specified in the request, allowing an attacker to cause unbounded memory consumption.

Potential denial of service in golang.org/x/crypto/ssh/agent

SSH clients receiving SSH_AGENT_SUCCESS when expecting a typed response will panic and cause early termination of the client process.

Path Traversal in LXD Instance Log File Retrieval

Path Traversal in the log file retrieval function in Canonical LXD 5.0 LTS on Linux allows authenticated remote attackers to read arbitrary files on the host system via crafted log file names or symbolic links.

Privilege Escalation via WebSocket Connection Hijacking in LXD Operations API

Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read permissions to hijack terminal or console sessions and execute arbitrary commands via WebSocket connection hijacking format

Source Container Identification Vulnerability via cmdline Spoofing in devLXD Server

Information Spoofing in devLXD Server in Canonical LXD versions 4.0 and above on Linux container platforms allows attackers with root privileges within any container to impersonate other containers and obtain their metadata, configuration, and device information via spoofed process names in the command line.

Incorrect Neutralization of Input During Web Page Generation in x/net in golang.org/x/net

The tokenizer incorrectly interprets tags with unquoted attribute values that end with a solidus character (/) as self-closing. When directly using Tokenizer, this can result in such tags incorrectly being marked as self-closing, and when using the Parse functions, this can result in content following such tags as being placed in the wrong scope during DOM construction, but only when tags are in foreign content (e.g. <math>, <svg>, etc contexts).

• Auf 3.0.3-0ubuntu1~18.04.2+esm2 aktualisieren

Usage of IPv6 zone IDs can bypass URI name constraints in crypto/x509

A certificate with a URI which has a IPv6 address with a zone ID may incorrectly satisfy a URI name constraint that applies to the certificate chain. Certificates containing URIs are not permitted in the web PKI, so this only affects users of private PKIs which make use of URIs.

Misuse of connection.serverAuthenticate may cause authorization bypass in golang.org/x/crypto

Applications and libraries which misuse connection.serverAuthenticate (via callback field ServerConfig.PublicKeyCallback) may be susceptible to an authorization bypass. The documentation for ServerConfig.PublicKeyCallback says that "A call to this function does not guarantee that the key offered is in fact used to authenticate." Specifically, the SSH protocol allows clients to inquire about whether a public key is acceptable before proving control of the corresponding private key. PublicKeyCallback may be called with multiple keys, and the order in which the keys were provided cannot be used to infer which key the client successfully authenti

CVE-2024-6219

Mark Laing discovered in LXD's PKI mode, until version 5.21.1, that a restricted certificate could be added to the trust store with its restrictions not honoured.

CVE-2024-6156

Mark Laing discovered that LXD's PKI mode, until version 5.21.2, could be bypassed if the client's certificate was present in the trust store.

CVE-2023-48795

The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with E

• Auf 3.0.3-0ubuntu1~18.04.2+esm1 aktualisieren

Improper rendering of text nodes in golang.org/x/net/html

Text nodes not in the HTML namespace are incorrectly literally rendered, causing text which should be escaped to not be. This could lead to an XSS attack.

• Auf 3.0.3-0ubuntu1~18.04.2+esm2 aktualisieren

Denial of service via crafted HTTP/2 stream in net/http and golang.org/x/net

A maliciously crafted HTTP/2 stream could cause excessive CPU consumption in the HPACK decoder, sufficient to cause a denial of service from a small number of small requests.

• Auf 3.0.3-0ubuntu1~18.04.2+esm2 aktualisieren

CVE-2022-27664

In net/http in Go before 1.18.6 and 1.19.x before 1.19.1, attackers can cause a denial of service because an HTTP/2 connection can hang during closing if shutdown were preempted by a fatal error.

• Auf 3.0.3-0ubuntu1~18.04.2+esm2 aktualisieren

CVE-2022-23806

Curve.IsOnCurve in crypto/elliptic in Go before 1.16.14 and 1.17.x before 1.17.7 can incorrectly return true in situations with a big.Int value that is not a valid field element.

CVE-2021-33194

golang.org/x/net before v0.0.0-20210520170846-37e1c6afe023 allows attackers to cause a denial of service (infinite loop) via crafted ParseFragment input.

• Auf 3.0.3-0ubuntu1~18.04.2+esm2 aktualisieren