Vulnerability Details : CVE-2022-34750
An issue was discovered in MediaWiki through 1.38.1. The lemma length of a Wikibase lexeme is currently capped at a thousand characters. Unfortunately, this length is not validated, allowing much larger lexemes to be created, which introduces various denial-of-service attack vectors within the Wikibase and WikibaseLexeme extensions. This is related to Special:NewLexeme and Special:NewProperty.
Vulnerability category: Denial of service
Products affected by CVE-2022-34750
- cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2022-34750
0.23%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 46 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2022-34750
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2022-34750
-
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.Assigned by: nvd@nist.gov (Primary)
References for CVE-2022-34750
-
https://phabricator.wikimedia.org/T308659
⚓ T308659 Validate lemma length in Special:NewLexeme(Alpha) and label/description/aliases length in Special:NewPropertyMailing List
-
https://gerrit.wikimedia.org/r/q/I8171bfef73e525d73efa60b407ce147130ea4742
I8171bfef73e525d73efa60b407ce147130ea4742 · Gerrit Code ReviewVendor Advisory
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https://gerrit.wikimedia.org/r/q/Id89a9b08e40f075d2d422cafd03668dff3ce7fc9
Id89a9b08e40f075d2d422cafd03668dff3ce7fc9 · Gerrit Code ReviewVendor Advisory
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