CVE-2017-7782 — An error in the "WindowsDllDetourPatcher" where a RWX ("Read/Write/Execute") 4k block is allocated but never protected, violating DEP protections

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MEDIUM

An error in the "WindowsDllDetourPatcher" where a RWX ("Read/Write/Execute") 4k block is allocated but never protected, violating DEP protections

Published Jun 11, 2018

5.3

MEDIUM

CVSS 3.0

EPSS 1.08%

Description

An error in the "WindowsDllDetourPatcher" where a RWX ("Read/Write/Execute") 4k block is allocated but never protected, violating DEP protections. Note: This attack only affects Windows operating systems. Other operating systems are not affected. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Affected products

Vendor Mozilla Product Firefox Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <55
Vendor Mozilla Product Firefox ESR Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <52.3
Vendor Mozilla Product Thunderbird Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <52.3

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
unspecified	affected	<55

Mozilla

Firefox ESR

n/a

Version	Status	Constraints
unspecified	affected	<52.3

Mozilla

Thunderbird

n/a

Version	Status	Constraints
unspecified	affected	<52.3

Remediation

No remediation recorded yet.

Metrics

1.08% 0.01079

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

EPSS probability 0.01079

Score over time

2021–2026

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v1
EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (18 key points)

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

Date	Score	Percentile	Model
Oct 1, 2026	1.08% (0.01079)	63.80th	v5 (v2026.06.15)
Jun 15, 2026	1.08% (0.01079)	60.58th	v5 (v2026.06.15)
Mar 17, 2025	0.54% (0.00540)	65.65th	v4 (v2025.03.14)
Dec 12, 2024	0.51% (0.00508)	77.31th	v3 (v2023.03.01)
Feb 8, 2024	0.51% (0.00508)	75.85th	v3 (v2023.03.01)
Dec 12, 2023	0.51% (0.00508)	73.84th	v3 (v2023.03.01)
Nov 2, 2023	0.69% (0.00693)	77.98th	v3 (v2023.03.01)
Jul 10, 2023	0.88% (0.00879)	80.27th	v3 (v2023.03.01)
Jun 5, 2023	0.90% (0.00900)	80.44th	v3 (v2023.03.01)
Mar 7, 2023	0.85% (0.00851)	79.66th	v3 (v2023.03.01)
Mar 6, 2023	1.11% (0.01108)	55.18th	v2 (v2022.01.01)
Sep 17, 2022	1.11% (0.01108)	53.57th	v2 (v2022.01.01)
Apr 1, 2022	1.11% (0.01108)	51.54th	v2 (v2022.01.01)
Feb 4, 2022	1.11% (0.01108)	29.61th	v2 (v2022.01.01)
Feb 3, 2022	14.43% (0.14429)	89.66th	v1
Jan 6, 2022	14.43% (0.14429)	89.55th	v1
Sep 1, 2021	14.43% (0.14429)	96.99th	v1
Apr 14, 2021	14.43% (0.14429)	0.00th	v1

Weaknesses (1)

CWE-269

Improper Privilege Management

References (6)

http://www.securityfocus.com/bid/100243
vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039124
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1344034
x_refsource_CONFIRMIssue TrackingPatch
https://www.mozilla.org/security/advisories/mfsa2017-18/
x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-19/
x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-20/
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
http://www.securityfocus.com/bid/100243		vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039124		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1344034		x_refsource_CONFIRMIssue TrackingPatch
https://www.mozilla.org/security/advisories/mfsa2017-18/		x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-19/		x_refsource_CONFIRMVendor Advisory
https://www.mozilla.org/security/advisories/mfsa2017-20/		x_refsource_CONFIRMVendor Advisory