Information disclosure in Canonical Ppp
CVE-2020-15704
The modprobe child process in the ./debian/patches/load_ppp_generic_if_needed patch file incorrectly handled module loading. A local non-root attacker could exploit the MODPROBE_OPTIONS environment variable to read arbitrary root files. Fixed in 2.4.5-5ubuntu1.4, 2.4.5-5.1ubuntu2.3+esm2, 2.4.7-1+2ubuntu1.16.04.3, 2.4.7-2+2ubuntu1.3, 2.4.7-2+4.1ubuntu5.1, 2.4.7-2+4.1ubuntu6. Was ZDI-CAN-11504.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (27.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Canonical Ppp — versions 2.4.5, 2.4.7
- Canonical Ubuntu Linux — versions 16.04, 18.04, 20.04
Weakness classification (CWE)
Public proof-of-concept exploits
References
- ubuntu.com/security/notices/USN-4451-1 (vendor-advisory, Vendor Advisory)
- ubuntu.com/security/notices/USN-4451-2 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-15704?
- CVE-2020-15704 is a medium-severity vulnerability in Canonical Ppp, classified under Information Disclosure. CVSS score: 5.5/10. Published 2020-09-01.
- How severe is CVE-2020-15704?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-15704 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.