Vulnerability Name: | CVE-2021-20185 (CCN-195790) |
Assigned: | 2020-12-17 |
Published: | 2021-01-25 |
Updated: | 2022-10-21 |
Summary: | It was found in Moodle before version 3.10.1, 3.9.4, 3.8.7 and 3.5.16 that messaging did not impose a character limit when sending messages, which could result in client-side (browser) denial of service for users receiving very large messages.
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CVSS v3 Severity: | 5.3 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) 4.6 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)Exploitability Metrics: | Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None | Scope: | Scope (S): Unchanged
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Low | 5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) 4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)Exploitability Metrics: | Attack Vector (AV): Network Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None | Scope: | Scope (S): Unchanged
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Low |
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CVSS v2 Severity: | 5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)Exploitability Metrics: | Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None | Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Partial | 5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)Exploitability Metrics: | Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Partial |
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Vulnerability Type: | CWE-770
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Vulnerability Consequences: | Denial of Service |
References: | Source: MITRE Type: CNA CVE-2021-20185
Source: XF Type: UNKNOWN moodle-cve202120185-dos(195790)
Source: CCN Type: Moodle Security Advisory MSA-21-0003 Client side denial of service via personal message
Source: MISC Type: Patch, Vendor Advisory https://moodle.org/mod/forum/discuss.php?d=417168
Source: CCN Type: WhiteSource Vulnerability Database CVE-2021-20185
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Vulnerable Configuration: | Configuration 1: cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.8.0 and < 3.8.7)OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.9.0 and < 3.9.4)OR cpe:/a:moodle:moodle:*:*:*:*:*:*:*:* (Version >= 3.5.0 and < 3.5.16)OR cpe:/a:moodle:moodle:3.10.0:*:*:*:*:*:*:* Configuration CCN 1: cpe:/a:moodle:moodle:3.5.0:*:*:*:*:*:*:*OR cpe:/a:moodle:moodle:3.10:*:*:*:*:*:*:*OR cpe:/a:moodle:moodle:3.9.3:*:*:*:*:*:*:*OR cpe:/a:moodle:moodle:3.8.6:*:*:*:*:*:*:*OR cpe:/a:moodle:moodle:3.5.15:*:*:*:*:*:*:*
Denotes that component is vulnerable |
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