Vulnerability Details CVE-2021-29157
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 29.3%
CVSS Severity
CVSS v3 Score 7.5
CVSS v2 Score 2.1
References
- https://dovecot.org/security
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JB2VTJ3G2ILYWH5Y2FTY2PUHT2MD6VMI/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
- https://security.gentoo.org/glsa/202107-41
- 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://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TK424DWFO2TKJYXZ2H3XL633TYJL4GQN/
- https://security.gentoo.org/glsa/202107-41
- https://www.openwall.com/lists/oss-security/2021/06/28/1
Products affected by CVE-2021-29157
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cpe:2.3:a:dovecot:dovecot:2.3.11.3
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cpe:2.3:a:dovecot:dovecot:2.3.13
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cpe:2.3:a:dovecot:dovecot:2.3.14
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cpe:2.3:o:fedoraproject:fedora:33
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cpe:2.3:o:fedoraproject:fedora:34