CVE-2024-43398
ADVISORY - githubSummary
Impact
The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes.
If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected.
Patches
The REXML gem 3.3.6 or later include the patch to fix the vulnerability.
Workarounds
Don't parse untrusted XMLs with tree parser API.
References
Common Weakness Enumeration (CWE)
Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
GitHub
2.2
CVSS SCORE
8.2high| Package | Type | OS Name | OS Version | Affected Ranges | Fix Versions |
|---|---|---|---|---|---|
| rexml | gem | - | - | <3.3.6 | 3.3.6 |
CVSS:4 Severity and metrics
The CVSS metrics represent different qualitative aspects of a vulnerability that impact the overall score, as defined by the CVSS Specification.
The vulnerable component is bound to the network stack, but the attack is limited at the protocol level to a logically adjacent topology. This can mean an attack must be launched from the same shared physical (e.g., Bluetooth or IEEE 802.11) or logical (e.g., local IP subnet) network, or from within a secure or otherwise limited administrative domain (e.g., MPLS, secure VPN to an administrative network zone). One example of an Adjacent attack would be an ARP (IPv4) or neighbor discovery (IPv6) flood leading to a denial of service on the local LAN segment (e.g., CVE-2013-6014).
Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.
The successful attack depends on the presence of specific deployment and execution conditions of the vulnerable system that enable the attack. These include: A race condition must be won to successfully exploit the vulnerability. The successfulness of the attack is conditioned on execution conditions that are not under full control of the attacker. The attack may need to be launched multiple times against a single target before being successful. Network injection. The attacker must inject themselves into the logical network path between the target and the resource requested by the victim (e.g. vulnerabilities requiring an on-path attacker).
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges.
There is no loss of confidentiality within the Vulnerable System.
There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
There is no loss of integrity within the Vulnerable System.
There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the Vulnerable System; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the Vulnerable System (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).
There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.
NIST
2.2
CVSS SCORE
5.9mediumAlpine
-
Debian
-
Ubuntu
-
CVSS SCORE
N/AlowAlma
-
CVSS SCORE
N/AmediumAlma
-
CVSS SCORE
N/AmediumAlma
-
CVSS SCORE
N/AmediumAlma
-
CVSS SCORE
N/AmediumAmazon
-
CVSS SCORE
N/AmediumRed Hat
2.2
CVSS SCORE
5.9mediumRocky
-
CVSS SCORE
N/AlowRocky
-
CVSS SCORE
N/AlowRocky
-
CVSS SCORE
N/AlowRocky
-
CVSS SCORE
N/AlowRocky
-
CVSS SCORE
N/AlowOracle
-
CVSS SCORE
N/AmediumOracle
-
CVSS SCORE
N/AmediumOracle
-
CVSS SCORE
N/AmediumOracle
-
CVSS SCORE
N/AmediumOracle
-
CVSS SCORE
N/AmediumChainguard
CGA-24v2-cqfr-9j2w
-
Chainguard
CGA-7j5v-cxjm-f8rv
-
Chainguard
CGA-7wc8-57gp-j287
-
Chainguard
CGA-cwr7-5cpq-rfhg
-
Chainguard
CGA-f9jf-pqxp-9c4f
-
Chainguard
CGA-fwcc-7mjx-4c8j
-
Chainguard
CGA-g699-9xhv-rx9c
-
Chainguard
CGA-gcr3-mcv7-cgqv
-
Chainguard
CGA-gpq2-hwhm-78qh
-
Chainguard
CGA-m429-99wf-94v2
-
Chainguard
CGA-mq3p-6x8v-q85m
-
Chainguard
CGA-pg34-92v8-xj59
-
Chainguard
CGA-pq65-7wj8-j735
-
Chainguard
CGA-pq96-mwgx-j88q
-
Chainguard
CGA-q5g9-46cr-4hxw
-
Chainguard
CGA-qgqg-33rj-jw2h
-
Chainguard
CGA-r3j8-hqmr-mpw7
-
Chainguard
CGA-rm82-9q24-hq2q
-
Chainguard
CGA-xg93-wp99-5mr2
-
minimos
MINI-h522-p92r-4mxc
-