CVE-2021-35525

MEDIUM
5.3
CVSS Score
Published: June 28, 2021 at 05:38 PM UTC
Updated: June 17, 2026 at 03:57 AM UTC
1 product affected across 1 vendorPostsrsd

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Severity
MEDIUM5.3
Exploit prediction
EPSS 2%

Description

PostSRSd before 1.11 allows a denial of service (subprocess hang) if Postfix sends certain long data fields such as multiple concatenated email addresses. NOTE: the PostSRSd maintainer acknowledges "theoretically, this error should never occur ... I'm not sure if there's a reliable way to trigger this condition by an external attacker, but it is a security bug in PostSRSd nevertheless."

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.11
Affected range stops below 1.11, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

x_refsource_MISCIssue TrackingPatchRelease NotesThird Party Advisory
https://bugs.gentoo.org/793674
x_refsource_MISCRelease NotesThird Party Advisory
https://github.com/roehling/postsrsd/releases/tag/1.11
Vendor Advisoryx_refsource_GENTOOThird Party Advisory
https://security.gentoo.org/glsa/202107-08

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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