Mozilla: Crash processing S/MIME messages with multiple signatures
Published Mar 2, 2020
6.5
MEDIUMCVSS 3.1
EPSS 1.31%
Description
When processing a message that contains multiple S/MIME signatures, a bug in the MIME processing code caused a null pointer dereference, leading to an unexploitable crash. This vulnerability affects Thunderbird < 68.5.
Affected products
-
- Version unspecifiedStatusaffectedConstraints<68.5
- 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 | Thunderbird | n/a |
|
- < 68.5.0
No data.
Red Hat Enterprise Linux 6
thunderbird-0:68.5.0-1.el6_10
Fixed · RHSA-2020:0574
Red Hat Enterprise Linux 7
thunderbird-0:68.5.0-1.el7_7
Fixed · RHSA-2020:0576
Red Hat Enterprise Linux 8
thunderbird-0:68.5.0-1.el8_1
Fixed · RHSA-2020:0577
Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions
thunderbird-0:68.5.0-1.el8_0
Fixed · RHSA-2020:0565
Red Hat Enterprise Linux 5
thunderbird
Out of support scope
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | thunderbird-0:68.5.0-1.el6_10 | Fixed | RHSA-2020:0574 |
| Red Hat Enterprise Linux 7 | thunderbird-0:68.5.0-1.el7_7 | Fixed | RHSA-2020:0576 |
| Red Hat Enterprise Linux 8 | thunderbird-0:68.5.0-1.el8_1 | Fixed | RHSA-2020:0577 |
| Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions | thunderbird-0:68.5.0-1.el8_0 | Fixed | RHSA-2020:0565 |
| Red Hat Enterprise Linux 5 | thunderbird | Out of support scope | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
AV:N/AC:M/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (15 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.31% (0.01305) | 69.53th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.31% (0.01305) | 69.25th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.45% (0.00451) | 75.38th | v3 (v2023.03.01) |
| Jul 14, 2024 | 0.45% (0.00451) | 75.35th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.32% (0.00318) | 69.66th | v3 (v2023.03.01) |
| Jan 4, 2024 | 0.32% (0.00318) | 67.32th | v3 (v2023.03.01) |
| Dec 20, 2023 | 0.23% (0.00231) | 61.18th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.19% (0.00193) | 55.27th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.13% (0.04134) | 68.25th | v2 (v2022.01.01) |
| Feb 3, 2022 | 5.36% (0.05363) | 79.74th | v1 |
| Jan 6, 2022 | 5.36% (0.05363) | 79.54th | v1 |
| Jan 5, 2022 | 1.25% (0.01247) | 69.74th | v5 (v2026.06.15) |
| Apr 14, 2021 | 1.25% (0.01247) | 0.00th | v1 |
References (10)
- https://access.redhat.com/security/cve/CVE-2020-6795 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1611105 x_refsource_MISCPermissions Required
- https://bugzilla.redhat.com/show_bug.cgi?id=1801957 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2020-6795
- https://security.gentoo.org/glsa/202003-10 vendor-advisoryx_refsource_GENTOO
- https://usn.ubuntu.com/4328-1/ vendor-advisoryx_refsource_UBUNTU
- https://usn.ubuntu.com/4335-1/ vendor-advisoryx_refsource_UBUNTU
- https://www.cve.org/CVERecord?id=CVE-2020-6795
- https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/#CVE-2020-6795
- https://www.mozilla.org/security/advisories/mfsa2020-07/ x_refsource_MISCVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-6795 | Vendor Advisory | |
| https://bugzilla.mozilla.org/show_bug.cgi?id=1611105 | x_refsource_MISCPermissions Required | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1801957 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-6795 | ||
| https://security.gentoo.org/glsa/202003-10 | vendor-advisoryx_refsource_GENTOO | |
| https://usn.ubuntu.com/4328-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://usn.ubuntu.com/4335-1/ | vendor-advisoryx_refsource_UBUNTU | |
| https://www.cve.org/CVERecord?id=CVE-2020-6795 | ||
| https://www.mozilla.org/en-US/security/advisories/mfsa2020-07/#CVE-2020-6795 | ||
| https://www.mozilla.org/security/advisories/mfsa2020-07/ | x_refsource_MISCVendor Advisory |
Change history (0)
No recorded changes yet.