CVE-2018-7284

Exp

A Buffer Overflow issue was discovered in Asterisk through 13.19.1, 14.x through 14.7.5, and 15.x through 15.2.1, and Certified Asterisk through 13.18-cert2. When processing a SUBSCRIBE request, the res_pjsip_pubsub module stores the accepted formats present in the Accept headers of the request. This code did not limit the number of headers it processed, despite having a fixed limit of 32. If more than 32 Accept headers were present, the code would write outside of its memory and cause a crash.

Published: 2018-02-22 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-7284 is rated High Exploit Risk (82.2/100): CVSS High severity, with high exploitation likelihood (EPSS 65.24%, 98th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.74% 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-2018-7284

EDB-ID Source Kind Published Link
44184 exploit_db edb 2018-02-27 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-7284

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 2025-12-28 62.50% 65.24% +2.74%
2 2025-12-27 65.24% 62.50% -2.74%
3 2025-11-21 — 65.24% —

Full EPSS history (26 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-7284

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.0 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 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:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
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:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2018-7284

OS Trackers for CVE-2018-7284

vendor priority summary link
debian not yet assigned CVE-2018-7284 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2. https://security-tracker.debian.org/tracker/CVE-2018-7284
ubuntu medium CVE-2018-7284 medium priority: Ubuntu including 1 source packages (asterisk), 20 status rows across 20 suites (artful, bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 15, needed 2, DNE 1, ignored 1, released 1. https://ubuntu.com/security/CVE-2018-7284

Affected software / configurations for CVE-2018-7284

Vendor Product Version Raw CPE
digium asterisk <= 13.19.1 cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk >= 14.0.0, <= 14.7.5 cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk >= 15.0.0, <= 15.2.1 cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium certified_asterisk 13.18 cpe:2.3:a:digium:certified_asterisk:13.18:cert1:*:*:*:*:*:*
digium certified_asterisk 13.18 cpe:2.3:a:digium:certified_asterisk:13.18:cert2:*:*:*:*:*:*
digium certified_asterisk <= 13.18 cpe:2.3:a:digium:certified_asterisk:*:*:*:*:*:*:*:*
debian debian_linux 9.0 cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

References for CVE-2018-7284

URL Tags
http://downloads.asterisk.org/pub/security/AST-2018-004.html Patch Vendor Advisory
http://www.securityfocus.com/bid/103151 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1040416 Third Party Advisory VDB Entry
https://www.debian.org/security/2018/dsa-4320 Third Party Advisory
https://www.exploit-db.com/exploits/44184/ Exploit Third Party Advisory VDB Entry
cvelogic Threat Intelligence