A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers.

Published 8 y ago 2018-06-11 · modified 4 mo ago 2026-06-17 · JSON

CVSS

9.8

v3.0 · NVD

CISA KEV

not known exploited

EPSS

3.3%

percentile 89%

Public exploits

none known

A use-after-free vulnerability can occur during WebRTC connections when interacting with the DTMF timers. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Firefox < 58.

Exploit prediction (EPSS)

3.28% probability of exploitation in the next 30 days, higher than 89% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
NVD	3.0	9.8	`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
NVD	2.0	7.5	`AV:N/AC:L/Au:N/C:P/I:P/A:P`

Affected products

Mozilla Firefox ESR
Mozilla Firefox

Classification

Weakness

CWE-416 Use After Free

References

mozilla.org /security/advisories/mfsa2018-03/ · x_refsource_CONFIRM, x_transferred
securitytracker.com /id/1040270 · vdb-entry, x_refsource_SECTRACK, x_transferred
securityfocus.com /bid/102783 · vdb-entry, x_refsource_BID, x_transferred
debian.org /security/2018/dsa-4096 · vendor-advisory, x_refsource_DEBIAN, x_transferred
bugzilla.mozilla.org /show_bug.cgi?id=1423086 · x_refsource_CONFIRM, x_transferred
usn.ubuntu.com /3544-1/ · vendor-advisory, x_refsource_UBUNTU, x_transferred
access.redhat.com /errata/RHSA-2018:0122 · vendor-advisory, x_refsource_REDHAT, x_transferred
mozilla.org /security/advisories/mfsa2018-02/ · x_refsource_CONFIRM, x_transferred
lists.debian.org /debian-lts-announce/2018/01/msg00030.html · mailing-list, x_refsource_MLIST, x_transferred
debian.org /security/2018/dsa-4102 · vendor-advisory, x_refsource_DEBIAN, x_transferred

Sources

CVE List: CVE-2018-5091
NVD: CVE-2018-5091

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