Deserialization in Parso Project
CVE-2019-12760
A deserialization vulnerability exists in the way parso through 0.4.0 handles grammar parsing from the cache. Cache loading relies on pickle and, provided that an evil pickle can be written to a cache grammar file and that its parsing can be triggered, this flaw leads to Arbitrary Code Execution. NOTE: This is disputed because "the cache directory is not under control of the attacker in any common configuration.
Vulnerability class: Insecure Deserialization
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.015 (74.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.015 · change: -0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- gist.github.com/dhondta/f71ae7e5c4234f8edfd2f12503a5dcc7 (Exploit, Third Party Advisory)
- github.com/davidhalter/parso/issues/75
Frequently asked questions
- What is CVE-2019-12760?
- CVE-2019-12760 is a low-severity vulnerability in Parso Project, classified under Deserialization of Untrusted Data. CVSS score: 3.3/10. Published 2019-06-06.
- How severe is CVE-2019-12760?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2019-12760 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.