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CVE-2017-5375

61
FAUCET Score

CVE-2017-5375 is a critical memory corruption vulnerability affecting Mozilla Firefox, Firefox ESR, and Thunderbird versions prior to 51, 45.7, and 45.7 respectively. This flaw allows for a bypass of ASLR and DEP protections through JIT code allocation, potentially leading to remote code execution. With a CVSS score of 9.8 (CRITICAL) and a FAUCET Risk Score of 98/100, it presents a severe risk due to its network-based attack vector and low attack complexity. While not listed on CISA's KEV catalog, multiple public exploits exist on ExploitDB, and it has garnered significant community discussion and media coverage, including its association with the "Disdain" exploit kit.

Impacted Technologies

VendorProductVersion(s)CPE
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
33.20%
Probability of exploitation in next 30 days
EPSS Percentile
98.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
ExploitDB: EDB-44294 · Mar 16, 2018
This CVE's current EPSS score of 0.3320 is in the 95th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

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 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 7Fixed in: thunderbird-0:45.7.0-1.el7_3
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
mozillavendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2017-5375Critical

Mozilla: Excessive JIT code allocation allows bypass of ASLR and DEP (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
Issue TrackingPermissions Required
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
exploit-db.com / exploits/42327
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/44293
ExploitThird Party AdvisoryVDB Entry
exploit-db.com / exploits/44294
ExploitThird Party AdvisoryVDB Entry
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/95757
Third Party AdvisoryVDB Entry
securitytracker.com / id/1037693
Third Party AdvisoryVDB Entry