Oracle Linux 9 : skopeo (ELSA-2023-7762)

medium Nessus Plugin ID 187029

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Synopsis

The remote Oracle Linux host is missing one or more security updates.

Description

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2023-7762 advisory.

- Extremely large RSA keys in certificate chains can cause a client/server to expend significant CPU time verifying signatures. With fix, the size of RSA keys transmitted during handshakes is restricted to <= 8192 bits. Based on a survey of publicly trusted RSA keys, there are currently only three certificates in circulation with keys larger than this, and all three appear to be test certificates that are not actively deployed. It is possible there are larger keys in use in private PKIs, but we target the web PKI, so causing breakage here in the interests of increasing the default safety of users of crypto/tls seems reasonable. (CVE-2023-29409)

- The html/template package does not apply the proper rules for handling occurrences of <script, <!--, and </script within JS literals in <script> contexts. This may cause the template parser to improperly consider script contexts to be terminated early, causing actions to be improperly escaped. This could be leveraged to perform an XSS attack. (CVE-2023-39319)

- Processing an incomplete post-handshake message for a QUIC connection can cause a panic. (CVE-2023-39321)

- The html/template package does not properly handle HTML-like comment tokens, nor hashbang #! comment tokens, in <script> contexts. This may cause the template parser to improperly interpret the contents of <script> contexts, causing actions to be improperly escaped. This may be leveraged to perform an XSS attack. (CVE-2023-39318)

- QUIC connections do not set an upper bound on the amount of data buffered when reading post-handshake messages, allowing a malicious QUIC connection to cause unbounded memory growth. With fix, connections now consistently reject messages larger than 65KiB in size. (CVE-2023-39322)

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

Solution

Update the affected skopeo and / or skopeo-tests packages.

Plugin Details

Severity: Medium

ID: 187029

File Name: oraclelinux_ELSA-2023-7762.nasl

Version: 1.0

Type: local

Agent: unix

Family: Oracle Linux Local Security Checks

Published: 12/15/2023

Updated: 12/15/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2023-39319

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

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

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

Vulnerability Information

CPE: cpe:/a:oracle:linux:9::appstream, cpe:/o:oracle:linux:9, p-cpe:/a:oracle:linux:skopeo, p-cpe:/a:oracle:linux:skopeo-tests

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/OracleLinux

Exploit Ease: No known exploits are available

Patch Publication Date: 12/13/2023

Vulnerability Publication Date: 8/2/2023

Reference Information

CVE: CVE-2023-29409, CVE-2023-39318, CVE-2023-39319, CVE-2023-39321, CVE-2023-39322

IAVB: 2023-B-0064-S, 2023-B-0068-S, 2023-B-0080-S

Detections

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