Deserialization in Deskpro
CVE-2020-11467
An issue was discovered in Deskpro before 2019.8.0. This product enables administrators to modify the helpdesk interface by editing /portal/api/style/edit-theme-set/template-sources theme templates, and uses TWIG as its template engine. While direct access to self and _self variables was not permitted, one could abuse the accessible variables in one's context to reach a native unserialize function via the code parameter. There, on could pass a crafted payload to trigger a set of POP gadgets in order to achieve remote code execution.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.040 (90.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000
Affected products
Weakness classification (CWE)
References
- blog.redforce.io/attacking-helpdesks-part-1-rce-chain-on-deskpro/ (Exploit, Third Party Advisory)
- support.deskpro.com/en/news/posts/deskpro-v2019-8-0-released-security-update (Release Notes, Vendor Advisory)
- support.deskpro.com/en/news/posts/deskpro-security-update-2019-09 (Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-11467?
- CVE-2020-11467 is a high-severity vulnerability in Deskpro, classified under Deserialization of Untrusted Data. CVSS score: 7.2/10. Published 2020-04-01.
- How severe is CVE-2020-11467?
- High severity. CVSS v3 base score is 7.2 out of 10.