CVE-2016-9928

Exp

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.

Published: 2020-02-06 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2016-9928 is rated High Exploit Risk (78/100): CVSS High severity, with high exploitation likelihood (EPSS 4.51%, 90th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.80% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2016-9928

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2016-9928

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.71% 4.51% +1.80%
2 2026-05-29 4.31% 2.71% -1.60%
3 2026-05-26 — 4.31% —

Full EPSS history (24 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2016-9928

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.4 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 5.2 [email protected]
5.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 4.9 [email protected]

Weakness enumeration for CVE-2016-9928

OS Trackers for CVE-2016-9928

vendor priority summary link
debian not yet assigned CVE-2016-9928 not yet assigned priority: Debian including 1 source packages (mcabber), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2016-9928
ubuntu medium CVE-2016-9928 medium priority: Ubuntu including 1 source packages (mcabber), 12 status rows across 12 suites (artful, bionic, cosmic, disco, eoan, focal, precise, trusty, upstream, xenial, yakkety, zesty): not-affected 5, ignored 4, DNE 1, needs-triage 1, released 1. https://ubuntu.com/security/CVE-2016-9928

Affected software / configurations for CVE-2016-9928

Vendor Product Version Raw CPE
mcabber mcabber >= 1.0.0, < 1.0.4 cpe:2.3:a:mcabber:mcabber:*:*:*:*:*:*:*:*
canonical ubuntu_linux 16.04 cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

References for CVE-2016-9928

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