Deserialization in Pippo

CVE-2018-18628

An issue was discovered in Pippo 1.11.0. The function SerializationSessionDataTranscoder.decode() calls ObjectInputStream.readObject() to deserialize a SessionData object without checking the object types. An attacker can create a malicious object, base64 encode it, and place it in the PIPPO_SESSION field of a cookie. Sending this cookie may lead to remote code execution.

Vulnerability class: Insecure Deserialization

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.055 (92.5th percentile), scored .

Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2018-18628: held from 0.055 to 0.055.

EPSS over last 30 days · oldest: 0.055 · newest: 0.055 · change: 0.000

Affected products

  • Pippo — versions 1.11.0

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2018-18628?
CVE-2018-18628 is a critical-severity vulnerability in Pippo, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2018-10-23.
How severe is CVE-2018-18628?
Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2018-18628 known to be exploited?
2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.