What’s Vulnerable › Vulnerabilities
CVE-2017-7779
- Severity: critical (CVSS 9.8 v3.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 2.7% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2018-06-11 · updated 2026-06-17
- Weakness: CWE-119
Description
Memory safety bugs were reported in Firefox 54, Firefox ESR 52.2, and Thunderbird 52.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
Affected products
- Debian Linux: 8.0, 9.0
- Mozilla Firefox: before 55.0; before 52.3.0 — fixed in 52.3.0, 55.0
- Mozilla Thunderbird: before 52.3.0 — fixed in 52.3.0
- RedHat Enterprise Linux Desktop: 6.0, 7.0
- RedHat Enterprise Linux Server: 6.0, 7.0
- RedHat Enterprise Linux Server Aus: 7.4
- RedHat Enterprise Linux Server Eus: 7.4, 7.5
- RedHat Enterprise Linux Workstation: 6.0, 7.0
How to fix
Upgrade to a fixed version: Mozilla Firefox 52.3.0, 55.0; Mozilla Thunderbird 52.3.0. Check the vendor advisory for mitigations.
References
- http://www.securityfocus.com/bid/100201
- http://www.securitytracker.com/id/1039124
- https://access.redhat.com/errata/RHSA-2017:2456
- https://access.redhat.com/errata/RHSA-2017:2534
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1354443%2C1368576%2C1366903%2C1369913%2C1371424%2C1346590%2C1371890%2C1372985%2C1362924%2C1368105%2C1369994%2C1371283%2C1368362%2C1378826%2C1380426%2C1368030%2C1373220%2C1321384%2C1383002
- https://security.gentoo.org/glsa/201803-14
- https://www.debian.org/security/2017/dsa-3928
- https://www.debian.org/security/2017/dsa-3968
- https://www.mozilla.org/security/advisories/mfsa2017-18/
- https://www.mozilla.org/security/advisories/mfsa2017-19/
- https://www.mozilla.org/security/advisories/mfsa2017-20/
- http://www.securityfocus.com/bid/100201
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