Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Dovecot | Dovecot | >= 2.3.11, < 2.3.14.1 |
| Fedoraproject | Fedora | 33 |
Related Weaknesses (CWE)
References
- https://dovecot.org/securityVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-41Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/28/1Mailing ListThird Party Advisory
- https://dovecot.org/securityVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-41Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/06/28/1Mailing ListThird Party Advisory
FAQ
What is CVE-2021-29157?
CVE-2021-29157 is a vulnerability with a CVSS score of 7.5 (HIGH). 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...
How severe is CVE-2021-29157?
CVE-2021-29157 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-29157?
Check the references section above for vendor advisories and patch information. Affected products include: Dovecot Dovecot, Fedoraproject Fedora.