Byobu apport hook uploads user's ~/.screenrc

published 2020-04-17 6 y ago modified 2026-06-17 4 mo ago also EUVD-2019-16850

cvss: 4.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Byobu Apport hook may disclose sensitive information since it automatically uploads the local user's .screenrc which may contain private hostnames, usernames and passwords. This issue affects: byobu

Patch / fix

fixed in 1 distros 1

Canonical byobu 5.128-0ubuntu1

byobu Ubuntu Pro 16.04 LTS 5.106-0ubuntu1+esm1

ubuntu advisories UBUNTU-CVE-2019-7306

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-7306 updated 2026-01-08 cvss 4.3

byobu: Byobu incorrectly handled certain Apport data

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.77% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

bugs.launchpad.net https://bugs.launchpad.net/ubuntu/+source/byobu/+bug/1827202 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	4.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

Canonical byobu

Classification

Weakness

CWE-552 Files or Directories Accessible to External Parties

References

bugs.launchpad.net /ubuntu/+source/byobu/+bug/1827202
exploit, third-party-advisory
cve.mitre.org /cgi-bin/cvename.cgi?name=CVE-2019-7306
third-party-advisory

Sources

CVE List CVE-2019-7306
NVD CVE-2019-7306

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary