CVE-2016-9928

Severity: high (CVSS 7.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2020-02-06 · updated 2026-06-17
Weakness: CWE-269

Description

MCabber before 1.0.4 is vulnerable to roster push attacks, which allows remote attackers to intercept communications, or add themselves as an entity on a 3rd party's roster as another user, which will also garner associated privileges, via crafted XMPP packets.

Affected products

Canonical Ubuntu Linux: 16.04
Debian Linux: 8.0
MCabber: from 1.0.0 before 1.0.4 — fixed in 1.0.4

How to fix

Upgrade to a fixed version: MCabber 1.0.4. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-updates/2017-01/msg00130.html
http://www.openwall.com/lists/oss-security/2016/12/11/2
http://www.openwall.com/lists/oss-security/2017/02/09/29
http://www.securityfocus.com/bid/94862
https://bitbucket.org/McKael/mcabber-crew/commits/6e1ead98930d7dd0a520ad17c720ae4908429033/raw
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=845258
https://bugzilla.redhat.com/show_bug.cgi?id=1403790
https://gultsch.de/gajim_roster_push_and_message_interception.html
https://lists.debian.org/debian-lts-announce/2020/06/msg00031.html
https://usn.ubuntu.com/4506-1/
http://lists.opensuse.org/opensuse-updates/2017-01/msg00130.html
http://www.openwall.com/lists/oss-security/2016/12/11/2

Get alerted when CVE-2016-9928 or the next vulnerability affects your stack