Bug 1911289 (CVE-2020-35679) - CVE-2020-35679 opensmtpd: memory leak via messages to an instance that performs many regex lookups due to a missing regfree call
Summary: CVE-2020-35679 opensmtpd: memory leak via messages to an instance that perfor...
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-35679
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: 1911290 1911291
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-12-28 15:19 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-12-28 18:27 UTC (History)
1 user (show)

Fixed In Version:
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Last Closed: 2020-12-28 18:27:36 UTC
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Description Guilherme de Almeida Suckevicz 2020-12-28 15:19:16 UTC
smtpd/table.c in OpenSMTPD before 6.8.0p1 lacks a certain regfree, which might allow attackers to trigger a "very significant" memory leak via messages to an instance that performs many regex lookups.

Reference:
https://www.mail-archive.com/misc@opensmtpd.org/msg05188.html

Upstream patch:
https://github.com/openbsd/src/commit/79a034b4aed29e965f45a13409268290c9910043

Comment 1 Guilherme de Almeida Suckevicz 2020-12-28 15:19:35 UTC
Created opensmtpd tracking bugs for this issue:

Affects: epel-all [bug 1911291]
Affects: fedora-all [bug 1911290]

Comment 2 Product Security DevOps Team 2020-12-28 18:27:36 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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