Search for vulnerabilities
Vulnerability details: VCID-7ufv-sfcu-aaae
Vulnerability ID VCID-7ufv-sfcu-aaae
Aliases CVE-2021-38502
Summary Thunderbird ignored the configuration to require STARTTLS security for an SMTP connection. A MITM could perform a downgrade attack to intercept transmitted messages, or could take control of the authenticated session to execute SMTP commands chosen by the MITM. If an unprotected authentication method was configured, the MITM could obtain the authentication credentials, too. This vulnerability affects Thunderbird < 91.2.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-319 Cleartext Transmission of Sensitive Information
System Score Found at
rhas Important https://access.redhat.com/errata/RHSA-2021:3838
rhas Important https://access.redhat.com/errata/RHSA-2021:3839
rhas Important https://access.redhat.com/errata/RHSA-2021:3840
rhas Important https://access.redhat.com/errata/RHSA-2021:3841
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38502.json
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00105 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00197 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.0036 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00364 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00405 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
epss 0.00864 https://api.first.org/data/v1/epss?cve=CVE-2021-38502
rhbs high https://bugzilla.redhat.com/show_bug.cgi?id=2013469
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38500
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38503
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38504
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38506
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38507
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38508
generic_textual Medium https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38509
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-38502
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-38502
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-38502
archlinux High https://security.archlinux.org/AVG-2459
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-47
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38502.json
https://api.first.org/data/v1/epss?cve=CVE-2021-38502
https://bugzilla.mozilla.org/show_bug.cgi?id=1733366
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38500
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38502
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38503
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38504
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38506
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38507
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38508
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38509
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4126
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4129
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43528
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43529
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43534
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43535
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43536
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43537
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43538
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43539
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43541
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43542
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43543
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43545
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43546
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44538
https://lists.debian.org/debian-lts-announce/2022/01/msg00001.html
https://www.debian.org/security/2022/dsa-5034
https://www.mozilla.org/security/advisories/mfsa2021-47/
2013469 https://bugzilla.redhat.com/show_bug.cgi?id=2013469
AVG-2459 https://security.archlinux.org/AVG-2459
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
CVE-2021-38502 https://nvd.nist.gov/vuln/detail/CVE-2021-38502
mfsa2021-47 https://www.mozilla.org/en-US/security/advisories/mfsa2021-47
RHSA-2021:3838 https://access.redhat.com/errata/RHSA-2021:3838
RHSA-2021:3839 https://access.redhat.com/errata/RHSA-2021:3839
RHSA-2021:3840 https://access.redhat.com/errata/RHSA-2021:3840
RHSA-2021:3841 https://access.redhat.com/errata/RHSA-2021:3841
USN-5248-1 https://usn.ubuntu.com/5248-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38502.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-38502
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-38502
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-38502
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.43911
EPSS Score 0.00105
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.