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.

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

EPSS: 0.004 (29.0th percentile) — read the EPSS interpretation.

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.

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

security@ubuntu.com (x_refsource_UBUNTU, vendor-advisory, Vendor Advisory)
security@ubuntu.com (x_refsource_UBUNTU, 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.