Bug 1977067 (CVE-2021-35525) - CVE-2021-35525 postsrsd: Denial of service (subprocess hang) if Postfix sends certain long data fields
Summary: CVE-2021-35525 postsrsd: Denial of service (subprocess hang) if Postfix sends...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2021-35525
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1977069
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-06-28 21:09 UTC by Pedro Sampaio
Modified: 2021-06-28 22:40 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-06-28 22:40:28 UTC
Embargoed:

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Description Pedro Sampaio 2021-06-28 21:09:21 UTC 
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."

References:

https://github.com/roehling/postsrsd/commit/077be98d8c8a9847e4ae0c7dc09e7474cbe27db2
https://bugs.gentoo.org/793674
https://github.com/roehling/postsrsd/releases/tag/1.11
Comment 1 Pedro Sampaio 2021-06-28 21:09:42 UTC 
Created postsrsd tracking bugs for this issue:

Affects: fedora-all [bug 1977069]
Comment 2 Product Security DevOps Team 2021-06-28 22:40:28 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
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