Bug 1849779 (CVE-2017-9109) - CVE-2017-9109 adns: out-of-bounds access when handling apparent answers
Summary: CVE-2017-9109 adns: out-of-bounds access when handling apparent answers
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2017-9109
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1849780
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-06-22 19:29 UTC by Guilherme de Almeida Suckevicz
Modified: 2020-06-24 12:39 UTC (History)
4 users (show)

Fixed In Version:
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Clone Of:
Environment:
Last Closed: 2020-06-22 23:20:37 UTC
Embargoed:


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Description Guilherme de Almeida Suckevicz 2020-06-22 19:29:29 UTC
An issue was discovered in adns before 1.5.2. It fails to ignore apparent answers before the first RR that was found the first time. when this is fixed, the second answer scan finds the same RRs at the first. Otherwise, adns can be confused by interleaving answers for the CNAME target, with the CNAME itself. In that case the answer data structure (on the heap) can be overrun. With this fixed, it prefers to look only at the answer RRs which come after the CNAME, which is at least arguably correct.

Reference:
https://www.chiark.greenend.org.uk/pipermail/adns-announce/2020/000004.html

Comment 1 Guilherme de Almeida Suckevicz 2020-06-22 19:29:46 UTC
Created adns tracking bugs for this issue:

Affects: fedora-all [bug 1849780]

Comment 2 Product Security DevOps Team 2020-06-22 23:20:37 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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