CVE-2019-17005 — Mozilla: Buffer overflow in plain text serializer

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HIGH

Mozilla: Buffer overflow in plain text serializer

Published Jan 8, 2020

8.8

HIGH

CVSS 3.1

EPSS 1.91%

Description

The plain text serializer used a fixed-size array for the number of <ol> elements it could process; however it was possible to overflow the static-sized array leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  before 71
  Status
  affected
  Constraints
  -
Vendor Mozilla Product Firefox ESR Default
n/a
- Version
  before 68.3
  Status
  affected
  Constraints
  -
Vendor Mozilla Product Thunderbird Default
n/a
- Version
  before 68.3
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Mozilla

Firefox

n/a

Version	Status	Constraints
before 71	affected	-

Mozilla

Firefox ESR

n/a

Version	Status	Constraints
before 68.3	affected	-

Mozilla

Thunderbird

n/a

Version	Status	Constraints
before 68.3	affected	-

Red Hat Enterprise Linux 6

firefox-0:68.3.0-1.el6_10

Fixed · RHSA-2019:4108
Red Hat Enterprise Linux 6

thunderbird-0:68.3.0-3.el6_10

Fixed · RHSA-2019:4205
Red Hat Enterprise Linux 7

firefox-0:68.3.0-1.el7_7

Fixed · RHSA-2019:4107
Red Hat Enterprise Linux 7

thunderbird-0:68.3.0-1.el7_7

Fixed · RHSA-2019:4148
Red Hat Enterprise Linux 8

firefox-0:68.3.0-1.el8_1

Fixed · RHSA-2019:4111
Red Hat Enterprise Linux 8

thunderbird-0:68.3.0-2.el8_1

Fixed · RHSA-2019:4195
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

firefox-0:68.4.1-1.el8_0

Fixed · RHSA-2020:0295
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions

thunderbird-0:68.4.1-2.el8_0

Fixed · RHSA-2020:0292
Red Hat Enterprise Linux 5

firefox

Out of support scope
Red Hat Enterprise Linux 5

thunderbird

Out of support scope

Product	Package	State	Advisory
Red Hat Enterprise Linux 6	firefox-0:68.3.0-1.el6_10	Fixed	RHSA-2019:4108
Red Hat Enterprise Linux 6	thunderbird-0:68.3.0-3.el6_10	Fixed	RHSA-2019:4205
Red Hat Enterprise Linux 7	firefox-0:68.3.0-1.el7_7	Fixed	RHSA-2019:4107
Red Hat Enterprise Linux 7	thunderbird-0:68.3.0-1.el7_7	Fixed	RHSA-2019:4148
Red Hat Enterprise Linux 8	firefox-0:68.3.0-1.el8_1	Fixed	RHSA-2019:4111
Red Hat Enterprise Linux 8	thunderbird-0:68.3.0-2.el8_1	Fixed	RHSA-2019:4195
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions	firefox-0:68.4.1-1.el8_0	Fixed	RHSA-2020:0295
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions	thunderbird-0:68.4.1-2.el8_0	Fixed	RHSA-2020:0292
Red Hat Enterprise Linux 5	firefox	Out of support scope	n/a
Red Hat Enterprise Linux 5	thunderbird	Out of support scope	n/a

Remediation

No remediation recorded yet.

Metrics

1.91% 0.01907

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.01907

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3
EPSS v4

Table of values (24 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	1.91% (0.01907)	79.02th	v5 (v2026.06.15)
Jun 15, 2026	1.89% (0.01892)	76.81th	v5 (v2026.06.15)
Dec 28, 2025	2.87% (0.02867)	85.84th	v4 (v2025.03.14)
Dec 27, 2025	1.66% (0.01659)	81.66th	v4 (v2025.03.14)
Nov 21, 2025	2.87% (0.02867)	85.78th	v4 (v2025.03.14)
Nov 18, 2025	0.90% (0.00899)	73.67th	v4 (v2025.03.14)
Oct 28, 2025	2.87% (0.02867)	85.74th	v4 (v2025.03.14)
Oct 27, 2025	1.66% (0.01659)	81.46th	v4 (v2025.03.14)
Oct 1, 2025	2.87% (0.02867)	85.80th	v4 (v2025.03.14)
Mar 30, 2025	1.25% (0.01251)	77.49th	v4 (v2025.03.14)
Mar 29, 2025	2.79% (0.02787)	76.75th	v4 (v2025.03.14)
Mar 17, 2025	1.25% (0.01251)	77.97th	v4 (v2025.03.14)
Dec 17, 2024	0.86% (0.00863)	82.09th	v3 (v2023.03.01)
May 3, 2024	1.39% (0.01387)	86.25th	v3 (v2023.03.01)
Dec 15, 2023	1.41% (0.01405)	84.96th	v3 (v2023.03.01)
Nov 29, 2023	1.23% (0.01233)	83.84th	v3 (v2023.03.01)
Mar 7, 2023	1.28% (0.01283)	83.64th	v3 (v2023.03.01)
Mar 6, 2023	1.54% (0.01537)	74.52th	v2 (v2022.01.01)
Apr 1, 2022	1.54% (0.01537)	72.41th	v2 (v2022.01.01)
Feb 4, 2022	12.26% (0.12262)	89.36th	v2 (v2022.01.01)
Feb 3, 2022	9.15% (0.09153)	86.59th	v1
Jan 6, 2022	9.15% (0.09153)	86.43th	v1
Jan 5, 2022	2.20% (0.02196)	78.24th	v5 (v2026.06.15)
Apr 14, 2021	2.20% (0.02196)	0.00th	v1

Weaknesses (2)

CWE-120

Classic Buffer Overflow

CWE-787

Out-of-bounds Write

References (17)

http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html
vendor-advisoryx_refsource_SUSEIssue TrackingThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html
vendor-advisoryx_refsource_SUSEIssue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2020:0292
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2020:0295
vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/security/cve/CVE-2019-17005
Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1584170
x_refsource_MISCExploitIssue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1779435
Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2019-17005
https://security.gentoo.org/glsa/202003-02
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202003-10
vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://usn.ubuntu.com/4241-1/
vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/4335-1/
vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2019-17005
https://www.mozilla.org/en-US/security/advisories/mfsa2019-37/#CVE-2019-17005
https://www.mozilla.org/security/advisories/mfsa2019-36/
x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-37/
x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-38/
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00000.html		vendor-advisoryx_refsource_SUSEIssue TrackingThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00001.html		vendor-advisoryx_refsource_SUSEIssue TrackingThird Party Advisory
https://access.redhat.com/errata/RHSA-2020:0292		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2020:0295		vendor-advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/security/cve/CVE-2019-17005		Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1584170		x_refsource_MISCExploitIssue TrackingVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1779435		Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2019-17005
https://security.gentoo.org/glsa/202003-02		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202003-10		vendor-advisoryx_refsource_GENTOOThird Party Advisory
https://usn.ubuntu.com/4241-1/		vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://usn.ubuntu.com/4335-1/		vendor-advisoryx_refsource_UBUNTUThird Party Advisory
https://www.cve.org/CVERecord?id=CVE-2019-17005
https://www.mozilla.org/en-US/security/advisories/mfsa2019-37/#CVE-2019-17005
https://www.mozilla.org/security/advisories/mfsa2019-36/		x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-37/		x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2019-38/		x_refsource_CONFIRMVendor Advisory