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CVE-2021-29157

Date: June 28, 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.

Language: C

Severity Score

Related Resources (15)

https://people.canonical.com/~ubuntu-security/cve/CVE-2021-29157
https://github.com/dovecot/core/commit/bae4e44596d6548322665d242b055f44fe1dc58d
https://www.openwall.com/lists/oss-security/2021/06/28/1
https://dovecot.org/security
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/
https://security.archlinux.org/CVE-2021-29157
https://security.gentoo.org/glsa/202107-41
https://access.redhat.com/security/cve/CVE-2021-29157
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/
https://nvd.nist.gov/vuln/detail/CVE-2021-29157
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
https://security.alpinelinux.org/vuln/CVE-2021-29157
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
https://security-tracker.debian.org/tracker/CVE-2021-29157
https://www.mend.io/vulnerability-database/CVE-2021-29157

Severity Score

Weakness Type (CWE)

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CWE-22

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): HIGH
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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