CVE-2021-23991
published 2021-06-24CVE-2021-23991: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet…
PriorityP431medium6.8CVSS 3.1
AVNACHPRNUIRSUCHIHAN
EPSS
1.03%
60.4th percentile
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | thunderbird | < thunderbird 1:78.10.0-1 (bookworm) | thunderbird 1:78.10.0-1 (bookworm) |
| mozilla | firefox | — | — |
| mozilla | thunderbird | < 78.9.1 | 78.9.1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.10.0-1 | 1:78.10.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.11.0+build1-0ubuntu0.18.04.2 | 1:78.11.0+build1-0ubuntu0.18.04.2 |
| mozilla | thunderbird | >= 0 < 1:78.11.0+build1-0ubuntu0.20.04.2 | 1:78.11.0+build1-0ubuntu0.20.04.2 |
| mozilla | thunderbird | >= unspecified < 78.9.1 | 78.9.1 |
CVSS provenance
nvdv3.16.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
nvdv2.04.0MEDIUMAV:N/AC:H/Au:N/C:P/I:P/A:N
osv7.4HIGH
vendor_ubuntu7.4HIGH
vendor_debian6.8MEDIUM
vendor_redhat6.8MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-x5j6-p8w8-5r65: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has
ghsa_unreviewed·2022-05-24
CVE-2021-23991 [MEDIUM] GHSA-x5j6-p8w8-5r65: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
OSV
thunderbird vulnerabilities
osv·2021-06-25·CVSS 7.4
[HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides
the corresponding updates for Ubuntu 18.04 LTS.
Original advisory details:
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
OSV
CVE-2021-23991: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has
osv·2021-06-24·CVSS 6.8
CVE-2021-23991 [MEDIUM] CVE-2021-23991: If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
OSV
thunderbird vulnerabilities
osv·2021-06-22·CVSS 7.4
CVE-2021-23961 [HIGH] thunderbird vulnerabilities
thunderbird vulnerabilities
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
installing a specially crafted extension, an attacker could potentially
exploit this to spoof a website and trick the user into providing
credentia
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-06-25·CVSS 7.4
CVE-2021-29948 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
USN-4995-1 fixed vulnerabilities in Thunderbird. This update provides
the corresponding updates for Ubuntu 18.04 LTS.
Original advisory details:
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-06-22·CVSS 7.4
CVE-2021-23961 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context, an
attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, spoof the UI, bypass security restrictions,
or execute arbitrary code. (CVE-2021-23961, CVE-2021-23981,
CVE-2021-23982, CVE-2021-23987, CVE-2021-23994, CVE-2021-23998,
CVE-2021-23999, CVE-2021-29945, CVE-2021-29946, CVE-2021-29967)
It was discovered that extensions could open popup windows with control
of the window title in some circumstances. If a user were tricked into
installing a specially crafted extension, an attacker could potentially
exploit
Red Hat
Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key
vendor_redhat·2021-04-08·CVSS 6.8
CVE-2021-23991 [MEDIUM] CWE-347 Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key
Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Debian
CVE-2021-23991: thunderbird - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has...
vendor_debian·2021·CVSS 6.8
CVE-2021-23991 [MEDIUM] CVE-2021-23991: thunderbird - If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has...
If a Thunderbird user has previously imported Alice's OpenPGP key, and Alice has extended the validity period of her key, but Alice's updated key has not yet been imported, an attacker may send an email containing a crafted version of Alice's key with an invalid subkey, Thunderbird might subsequently attempt to use the invalid subkey, and will fail to send encrypted email to Alice. This vulnerability affects Thunderbird < 78.9.1.
Scope: local
bookworm: resolved (fixed in 1:78.10.0-1)
bullseye: resolved (fixed in 1:78.10.0-1)
forky: resolved (fixed in 1:78.10.0-1)
sid: resolved (fixed in 1:78.10.0-1)
trixie: resolved (fixed in 1:78.10.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-13: CVE-2021-23991
vendor_mozilla·CVSS 6.8
CVE-2021-23991 [MEDIUM] Mozilla Foundation Security Advisory 2021-13: CVE-2021-23991
Mozilla Foundation Security Advisory 2021-13
CVE: CVE-2021-23991
Product: Thunderbird
Impact: low
Fixed in: Thunderbird 78.9.1
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2021-06-24
Published