CVE-2012-4502

Description

Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow. NOTE: versions 1.27 and 1.28 do not require authentication to exploit.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.95% Top 25%
Vendor Advisory debian.org Vendor Advisory gmane.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://permalink.gmane.org/gmane.comp.time.chrony.announce/15 mailing list patch vendor advisory
http://www.debian.org/security/2013/dsa-2760 vendor advisory
http://seclists.org/oss-sec/2013/q3/332 mailing list patch
http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1
https://bugzilla.redhat.com/show_bug.cgi?id=846392 patch

Frequently Asked Questions

What is the severity of CVE-2012-4502?
CVE-2012-4502 has been scored as a medium severity vulnerability.
How to fix CVE-2012-4502?
To fix CVE-2012-4502, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-4502 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2012-4502 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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