Is CVE-2021-29157 in the CISA KEV catalog?

No. CVE-2021-29157 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-29157?

CVE-2021-29157 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-29157?

CVE-2021-29157 has an EPSS score of 0.47% (37th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-29157?

Upgrade dovecot on debian 11 to 1:2.3.13+dfsg1-2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-29157

HIGH

7.5

CVSS v3

NVD

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.

CWE-22Path Traversal

How to fix

Remediation Available

dovecotDebian

Fixed in:1:2.3.13+dfsg1-2CVE-2021-29157

dovecotUbuntu

Fixed in:1:2.3.7.2-1ubuntu3.4USN-4993-1

dovecot-coreUbuntu

Fixed in:1:2.3.7.2-1ubuntu3.4USN-4993-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Exploit Intelligence

0.47%probability of exploitation in 30 days

37thpercentile

Low risk: more likely to be exploited than 37% of all known CVEs.

References

Vendor Advisory1

dovecot.org

Third-Party Advisory2

Other references2

Related Vulnerabilities

Other CWE-22 (Path Traversal) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-23897	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2023-32315	High	8.6	100%	KEV	Fix
CVE-2022-29464	Critical	9.8	100%	KEV + Ransom	-
CVE-2021-26086	Medium	5.3	100%	KEV	Fix
CVE-2021-22005	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2020-5902	Critical	9.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.