CVE-2021-29157
Published: 21 June 2021
Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
Notes
| Author | Note |
|---|---|
| mdeslaur | per upstream, this affects 2.3.11-2.3.14 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
dovecot Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| groovy |
Released
(1:2.3.11.3+dfsg1-2ubuntu0.2)
|
|
| hirsute |
Released
(1:2.3.13+dfsg1-1ubuntu1.1)
|
|
| impish |
Released
(2.3.13+dfsg1-1ubuntu2)
|
|
| jammy |
Released
(2.3.13+dfsg1-1ubuntu2)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Released
(2.3.14.1)
|
|
| xenial |
Not vulnerable
(code not present)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |