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CVE-2017-5378

23
FAUCET Score

CVE-2017-5378 is a high-severity information disclosure vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 51, 45.7, and 45.7 respectively. It allows an attacker to leak object addresses and content by exploiting shared JavaScript object hash codes between pages. With a CVSS score of 7.5, this vulnerability has a network attack vector and low attack complexity, potentially leading to significant confidentiality impacts. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
3.37%
Probability of exploitation in next 30 days
EPSS Percentile
87.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0337 is in the 78th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

mozillapatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: firefox-0:45.7.0-2.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: thunderbird-0:45.7.0-1.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: firefox-0:45.7.0-2.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: thunderbird-0:45.7.0-1.el6_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:45.7.0-2.el7_3
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:45.7.0-1.el7_3
View patch

Vendor Advisories (1)

redhatCVE-2017-5378Moderate

Mozilla: Pointer and frame data leakage of Javascript objects (MFSA 2017-02)

Jan 24, 2017

References

rhn.redhat.com / errata/RHSA-2017-0190.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2017-0238.html
Third Party Advisory
bugzilla.mozilla.org / show_bug.cgi
ExploitIssue TrackingVendor Advisory
bugzilla.mozilla.org / show_bug.cgi
Issue TrackingPatchVendor Advisory
security.gentoo.org / glsa/201702-13
Third Party Advisory
security.gentoo.org / glsa/201702-22
Third Party Advisory
debian.org / security/2017/dsa-3771
Third Party Advisory
debian.org / security/2017/dsa-3832
Third Party Advisory
mozilla.org / security/advisories/mfsa2017-01
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-02
Vendor Advisory
mozilla.org / security/advisories/mfsa2017-03
Vendor Advisory
securityfocus.com / bid/95769
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037693
Third Party AdvisoryVDB Entry