Known exploited vulnerability
CVE-2020-17496
The short answer
CVE-2020-17496 affects n/a n/a and is rated critical (CVSS 9.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2021-11-03: attackers are using it, so patch it first. The vendor has linked a patch.
What it is
vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. NOTE: this issue exists because of an incomplete fix for CVE-2019-16759.
Weakness: CWE-74.
Severity
9.8 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Nov 3, 2021
Federal due date May 3, 2022
EPSS, next 30 days
87%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
n/a. NVD's record lists the exact affected versions.
References
- blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/ ExploitThird Party Advisory
- cwe.mitre.org/data/definitions/78.html Technical Description
- forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4445227-vbulletin-5-6-0-5-6-1-5-6-2-security-patch PatchVendor Advisory
- seclists.org/fulldisclosure/2020/Aug/5 ExploitMailing ListThird Party Advisory
- blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/ ExploitThird Party Advisory
- cwe.mitre.org/data/definitions/78.html Technical Description
- forum.vbulletin.com/forum/vbulletin-announcements/vbulletin-announcements_aa/4445227-vbulletin-5-6-0-5-6-1-5-6-2-security-patch PatchVendor Advisory
- seclists.org/fulldisclosure/2020/Aug/5 ExploitMailing ListThird Party Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-17496 US Government Resource
Questions
Is CVE-2020-17496 being exploited?
Yes. CISA added CVE-2020-17496 to its Known Exploited Vulnerabilities catalog on 2021-11-03, with a federal remediation due date of 2022-05-03.
How do I fix CVE-2020-17496?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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