Bug 841298 - pmcd leaks memory in DoFetch error path
pmcd leaks memory in DoFetch error path
Product: Fedora
Classification: Fedora
Component: pcp (Show other bugs)
Unspecified Unspecified
unspecified Severity unspecified
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Assigned To: Ken McDonell
Fedora Extras Quality Assurance
: Security
Depends On:
Blocks: 840765 CVE-2012-3420
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Reported: 2012-07-18 11:21 EDT by Florian Weimer
Modified: 2012-08-20 00:03 EDT (History)
4 users (show)

See Also:
Fixed In Version: pcp-3.6.5
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2012-08-20 00:03:43 EDT
Type: Bug
Regression: ---
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
proposed patch for dofetch.c (700 bytes, patch)
2012-07-20 07:32 EDT, Ken McDonell
no flags Details | Diff

  None (edit)
Description Florian Weimer 2012-07-18 11:21:46 EDT
This code path in DoFetch in src/pmcd/src/dofetch.c is problematic:

    sts = __pmDecodeFetch(pb, &ctxnum, &when, &nPmids, &pmidList);
    /* Check that a profile has been received from the specified context */
    if (ctxnum < 0 || ctxnum >= cip->szProfile ||
	cip->profile[ctxnum] == NULL) {
	__pmNotifyErr(LOG_ERR, "DoFetch: no profile for ctxnum = %d\n", ctxnum);

__pmDecodeFetch pins the PDU buffer, but if the ctxnum is not valid, it is never unpinned.  This can be abused by unauthenticated pmcd clients to consume increasing amounts of memory, eventually crashing pmcd.
Comment 2 Mark Goodwin 2012-07-19 20:07:40 EDT
Ken requested assignment, thanks Ken!
Comment 3 Ken McDonell 2012-07-20 07:32:57 EDT
Created attachment 599366 [details]
proposed patch for dofetch.c

This one is done I believe.
Comment 4 Huzaifa S. Sidhpurwala 2012-08-16 00:09:31 EDT
Upstream patch:


This issue has been addressed in pcp-3.6.5

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