Mozilla: Setting a master password post-Firefox 58 does not delete unencrypted previously stored passwords
Published Oct 18, 2018
5.5
MEDIUMCVSS 3.0
EPSS 0.46%
Description
If a user saved passwords before Firefox 58 and then later set a master password, an unencrypted copy of these passwords is still accessible. This is because the older stored password file was not deleted when the data was copied to a new format starting in Firefox 58. The new master password is added only on the new file. This could allow the exposure of stored password data outside of user expectations. This vulnerability affects Firefox < 62, Firefox ESR < 60.2.1, and Thunderbird < 60.2.1.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<62
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.2.1
- Version
-
- Version unspecifiedStatusaffectedConstraints<60.2.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mozilla | Firefox | n/a |
| ||||||
| Mozilla | Firefox ESR | n/a |
| ||||||
| Mozilla | Thunderbird | n/a |
|
Configuration 1
- 6.0
- 7.0
- 6.0
- 7.0
- 7.6
- 7.5
- 7.6
- 7.6
- 6.0
- 7.0
Configuration 2
- 8.0
- 9.0
Configuration 3
- 14.04
- 16.04
- 18.04
Configuration 4
- < 62.0
- < 60.2.1
- < 60.2.1
No data.
Red Hat Enterprise Linux 6
firefox-0:60.2.1-1.el6
Fixed · RHSA-2018:2834
Red Hat Enterprise Linux 6
thunderbird-0:60.2.1-5.el6
Fixed · RHSA-2018:3403
Red Hat Enterprise Linux 7
firefox-0:60.2.1-1.el7_5
Fixed · RHSA-2018:2835
Red Hat Enterprise Linux 7
thunderbird-0:60.2.1-4.el7_5
Fixed · RHSA-2018:3458
Red Hat Enterprise Linux 8
firefox
Not affected
Red Hat Enterprise Linux 8
thunderbird
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | firefox-0:60.2.1-1.el6 | Fixed | RHSA-2018:2834 |
| Red Hat Enterprise Linux 6 | thunderbird-0:60.2.1-5.el6 | Fixed | RHSA-2018:3403 |
| Red Hat Enterprise Linux 7 | firefox-0:60.2.1-1.el7_5 | Fixed | RHSA-2018:2835 |
| Red Hat Enterprise Linux 7 | thunderbird-0:60.2.1-4.el7_5 | Fixed | RHSA-2018:3458 |
| Red Hat Enterprise Linux 8 | firefox | Not affected | n/a |
| Red Hat Enterprise Linux 8 | thunderbird | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Upstream decided to not fix this issue in Firefox ESR 60.2 given the low impact. A future ESR update may correct this flaw. This flaw would impact users who had saved passwords from Firefox 58 or earlier that were not protected by a master password (resulting in an un-encrypted `key3.db`), but set a master password when using Firefox 59 or newer (resulting in an encrypted `key4.db`). The old key file was kept around to facilitate downgrading to Firefox 58. This flaw cannot be exploited through email in Thunderbird as scripting is disabled in this for email content. It may be possible to exploit through Feeds (Atom or RSS) or other browser-like contexts.
Red Hat mitigation
To mitigate against this flaw, examine user profile directories for the presence of both `key3.db` and `key4.db` files. If both are present, `key3.db` should be deleted.
References (23)
- http://www.securityfocus.com/bid/105276 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041610 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041701 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2834 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2835 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3403 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3458 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2018-12383 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1475775 x_refsource_CONFIRMExploitIssue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1625531 Issue Tracking
- https://lists.debian.org/debian-lts-announce/2018/11/msg00011.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-12383
- https://security.gentoo.org/glsa/201810-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://security.gentoo.org/glsa/201811-13 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://usn.ubuntu.com/3761-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3793-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-12383
- https://www.debian.org/security/2018/dsa-4304 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.debian.org/security/2018/dsa-4327 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2018-20/#CVE-2018-12383
- https://www.mozilla.org/security/advisories/mfsa2018-20/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-23/ x_refsource_CONFIRMVendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2018-25/ x_refsource_CONFIRMVendor Advisory
Change history (0)
No recorded changes yet.