What’s Vulnerable › Vulnerabilities

CVE-2017-5375

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 34.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-119

Description

JIT code allocation can allow for a bypass of ASLR and DEP protections leading to potential memory corruption attacks. This vulnerability affects Thunderbird < 45.7, Firefox ESR < 45.7, and Firefox < 51.

Affected products

• Debian Linux: 8.0
• Mozilla Firefox: before 45.7.0; before 51.0.1 — fixed in 45.7.0, 51.0.1
• Mozilla Thunderbird: before 45.7.0 — fixed in 45.7.0
• RedHat Enterprise Linux Desktop: 5.0, 6.0, 7.0
• RedHat Enterprise Linux Server: 5.0, 6.0, 7.0
• RedHat Enterprise Linux Workstation: 5.0, 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 45.7.0, 51.0.1; Mozilla Thunderbird 45.7.0. Check the vendor advisory for mitigations.

References

• http://rhn.redhat.com/errata/RHSA-2017-0190.html
• http://rhn.redhat.com/errata/RHSA-2017-0238.html
• http://www.securityfocus.com/bid/95757
• http://www.securitytracker.com/id/1037693
• https://bugzilla.mozilla.org/show_bug.cgi?id=1325200
• https://security.gentoo.org/glsa/201702-13
• https://security.gentoo.org/glsa/201702-22
• https://www.debian.org/security/2017/dsa-3771
• https://www.debian.org/security/2017/dsa-3832
• https://www.exploit-db.com/exploits/42327/
• https://www.exploit-db.com/exploits/44293/
• https://www.exploit-db.com/exploits/44294/

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