CVE-2017-7796 json
On Windows systems, the logger run by the Windows updater deletes the file "update.log" before it runs in order to write a new log of that…
published 2018-06-11 8 y ago modified 2026-06-17 4 mo ago also EUVD-2017-16771
- cvss
- 4.7
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
On Windows systems, the logger run by the Windows updater deletes the file "update.log" before it runs in order to write a new log of that name. The path to this file is supplied at the command line to the updater and could be used in concert with another local exploit to delete a different file named "update.log" instead of the one intended. Note: This attack only affects Windows operating systems. Other operating systems are not affected. This vulnerability affects Firefox < 55.
Patch / fix
- Mozilla Firefox 55
- firefox-esr openSUSE Tumbleweed 128.5.1-1.1
- MozillaFirefox openSUSE Tumbleweed 92.0-1.2
opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10600-1
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.7 | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 3.3 | AV:L/AC:M/Au:N/C:N/I:P/A:P |
Affected products
- Mozilla Firefox
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
bugzilla.mozilla.org
/show_bug.cgi?id=1234401
issue-tracking, patch, vendor-advisory
-
mozilla.org
/security/advisories/mfsa2017-18/
vendor-advisory
-
securitytracker.com
/id/1039124
vdb-entry, third-party-advisory
Sources
- CVE List CVE-2017-7796
- NVD CVE-2017-7796
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