In res/res_rtp_asterisk.c in Asterisk 11.x before 11.25.2, 13.x before 13.17.1, and 14.x before 14.6.1 and Certified Asterisk 11.x before 11.6-cert17 and 13.x before 13.13-cert5, unauthorized data disclosure (media takeover in the RTP stack) is possible with careful timing by an attacker. The "strictrtp" option in rtp.conf enables a feature of the RTP stack that learns the source address of media for a session and drops any packets that do not originate from the expected address. This option is enabled by default in Asterisk 11 and above. The "nat" and "rtp_symmetric" options (for chan_sip and chan_pjsip, respectively) enable symmetric RTP support in the RTP stack. This uses the source address of incoming media as the target address of any sent media. This option is not enabled by default, but is commonly enabled to handle devices behind NAT. A change was made to the strict RTP support in the RTP stack to better tolerate late media when a reinvite occurs. When combined with the symmetric RTP support, this introduced an avenue where media could be hijacked. Instead of only learning a new address when expected, the new code allowed a new source address to be learned at all times. If a flood of RTP traffic was received, the strict RTP support would allow the new address to provide media, and (with symmetric RTP enabled) outgoing traffic would be sent to this new address, allowing the media to be hijacked. Provided the attacker continued to send traffic, they would continue to receive traffic as well.
CVE-2017-14099
“—” beside the score: it is equal to NVD's CVSS score.
Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 7.5; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5HIGHmedium confidence
- EG Risk
- 35EG Risk 35/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity75% × 45%Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation4.3% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 4.3%
- EPSS %ILE
- 91st
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 4.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-21). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 2, 2017
Last Modified
June 17, 2026
Advisory Details (6)
Auto-updated Oct 22, 2026[SECURITY] [DSA 3964-1] asterisk security update
http://www.debian.org/security/2017/dsa-3964Asterisk: Multiple vulnerabilities (GLSA 201710-29) — Gentoo security
https://security.gentoo.org/glsa/201710-29ASTERISK-27013: res_rtp_asterisk: Media can be hijacked even with strict RTP enabled
https://issues.asterisk.org/jira/browse/ASTERISK-27013#873907 - asterisk: CVE-2017-14099: AST-2017-005: Media takeover in RTP stack - Debian Bug report logs
https://bugs.debian.org/873907Affected Packages
(4 across 4 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| asterisk | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| asterisk | 0.1.11-3 ... 1:13.9.1~dfsg-2 (213 versions) |
| — |
Debian:8(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| asterisk | 1:11.13.1~dfsg-2, 1:11.13.1~dfsg-2+deb8u1, 1:11.13.1~dfsg-2+deb8u2 |
| — |
Debian:9(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| asterisk | 1:13.14.1~dfsg-2 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 31× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 94 of 165 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 71 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-22 16:27 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-22 04:50 UTCEG score recompute
- 2026-10-22 04:49 UTCGHSA enrichmentGHSA-4q58-999f-6rpw · GitHub severity HIGH · GitHub CVSS 7.5
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-20 16:27 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-19 16:26 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-18 16:26 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-18 10:39 UTCEG score recompute
- 2026-10-17 16:27 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-16 16:29 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-15 16:26 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-14 16:27 UTCEPSS rescoreEPSS 4.3% · 91st percentile
- 2026-10-13 16:27 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-12 20:34 UTCEG score recompute
- 2026-10-12 16:28 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-12 00:57 UTCEG score recompute
- 2026-10-11 13:40 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-10 19:55 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-09 20:02 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-08 16:35 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-08 00:24 UTCOSV refresh
- 2026-10-07 23:41 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-06 15:11 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-05 17:38 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-10-03 14:21 UTCEPSS rescoreEPSS 4.3% · 90th percentile
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- 2026-09-30 14:58 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-30 09:27 UTCEG score recompute
- 2026-09-28 13:45 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-26 15:53 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-19 15:36 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-18 19:22 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-18 06:36 UTCOSV refresh
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-15 03:05 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-12 14:55 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-11 09:31 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-10 09:26 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-07 15:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-04 05:01 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-02 14:07 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-01 13:48 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-09-01 03:31 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-30 19:13 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-30 07:00 UTCOSV refresh
- 2026-08-28 21:36 UTCEPSS rescoreEPSS 3.7% · 89th percentile
- 2026-08-27 14:20 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-26 14:41 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-25 13:44 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-24 14:10 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-21 23:44 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-20 22:50 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-19 16:59 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-18 13:43 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-17 13:42 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-16 14:51 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-16 02:10 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-15 01:26 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-13 22:44 UTCOSV refresh
- 2026-08-13 21:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-09 13:42 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-08 16:32 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-07 16:22 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-06 13:42 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-05 19:12 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-04 15:05 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-04 10:32 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-03 10:30 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-02 02:23 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-08-01 04:11 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-30 01:26 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-29 01:47 UTCOSV refresh
- 2026-07-28 15:32 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-25 14:13 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-23 14:15 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-23 01:27 UTCEG score recompute
- 2026-07-22 22:06 UTCEG score recompute
- 2026-07-22 14:04 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-21 15:21 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-19 14:28 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-19 02:26 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-18 10:00 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-16 16:59 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-15 16:54 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-15 01:56 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-13 22:26 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-13 06:09 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-12 05:43 UTCEPSS rescoreEPSS 4.3% · 90th percentile
- 2026-07-11 18:22 UTCOSV refresh
- 2026-07-11 08:24 UTCEPSS rescoreEPSS 4.3% · 90th percentile
Related CVEs(same product + same CWE)
Same product
10 shownDebian:8:asterisk
- CVE-2017-14100EG 9.8EPSS p97CRITICAL
- CVE-2019-18610EG 8.9EPSS p99HIGH
- CVE-2017-17090NVD 7.5EG 8.9EPSS p100HIGH
- CVE-2018-17281NVD 7.5EG 8.1EPSS p99HIGH
- CVE-2017-14603EG 7.5HIGH
- CVE-2019-18790EG 6.5EPSS p91MEDIUM
- CVE-2016-7551EG 7.5EPSS p93HIGH
- CVE-2016-2232EG 6.5EPSS p92MEDIUM
- CVE-2016-2316EG 5.9EPSS p92MEDIUM
- CVE-2015-3008EG 4.3EPSS p99MEDIUM
Frequently asked(5)
What is CVE-2017-14099?
When was CVE-2017-14099 made public?
Is CVE-2017-14099 actively exploited?
What is the CVSS score of CVE-2017-14099?
How do I remediate CVE-2017-14099?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2017-14099
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