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Fencer Vulns
high 7.1

CVE-2022-22753 json

A Time-of-Check Time-of-Use bug existed in the Maintenance (Updater) Service that could be abused to grant Users write access to an arbitra…

published 2022-12-22 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-27896

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.7%
EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits
0
none known

Summary

A Time-of-Check Time-of-Use bug existed in the Maintenance (Updater) Service that could be abused to grant Users write access to an arbitrary directory. This could have been used to escalate to SYSTEM access.<br>*This bug only affects Firefox on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

Patch / fix

  • Mozilla Firefox 97
  • Mozilla Thunderbird 91.6
  • Mozilla Firefox ESR 91.6
  • MozillaFirefox SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +8 more 91.6.0-152.15.1
  • MozillaFirefox SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +7 more 91.6.0-150.18.1
  • MozillaFirefox SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +11 more 91.6.0-112.89.1
  • MozillaThunderbird SLE Workstation Extension 15 SP3 91.6.1-8.54.1
  • MozillaFirefox SLES 11 SP4-LTSS 91.6.0-78.162.2

suse advisories SUSE-SU-2022:0696-1SUSE-SU-2022:0676-1SUSE-SU-2022:0565-1SUSE-SU-2022:14896-1SUSE-SU-2022:0559-1

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 97.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 91.6.0-1.1
  • MozillaThunderbird openSUSE Leap 15.3 91.6.1-8.54.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:11837-1openSUSE-SU-2024:11842-1openSUSE-SU-2022:0559-1

  • firefox Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 97.0-r0
  • librewolf Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 97.0-r0
  • thunderbird Alpine 3.23, Alpine 3.22, Alpine 3.21 +5 more 91.6.0-r0

alpine advisories ALPINE-CVE-2022-22753

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-22753 updated cvss 7.5

Mozilla: Privilege Escalation to SYSTEM on Windows via Maintenance Service

  • Red Hat Enterprise Linux 6 firefox, thunderbird Red Hat Enterprise Linux 7 firefox, thunderbird Red Hat Enterprise Linux 8 firefox, thunderbird Red Hat Enterprise Linux 9 firefox, firefox-x11, thunderbird
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
18 mo ago

Exploit prediction

0.65% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=1732435 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

  • Mozilla Firefox
  • Mozilla Thunderbird
  • Mozilla Firefox ESR

Classification

Weakness
  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.