CVE-2012-4502
published 2013-11-05CVE-2012-4502: 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)…
PriorityP427medium5CVSS 2.0
AVNACLAuNCNINAP
EPSS
3.27%
87.0th percentile
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.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | chrony | < chrony 1.29-1 (bookworm) | chrony 1.29-1 (bookworm) |
| tuxfamily | chrony | <= 1.28 | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
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| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | >= 0 < 1.29-1 | 1.29-1 |
| tuxfamily | chrony | >= 0 < 1.29-1 | 1.29-1 |
| tuxfamily | chrony | >= 0 < 1.29-1 | 1.29-1 |
| tuxfamily | chrony | >= 0 < 1.29-1 | 1.29-1 |
CVSS provenance
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv5.0MEDIUM
vendor_debian5.0MEDIUM
vendor_redhat5.0MEDIUM
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GHSA
GHSA-93mp-m23x-f3x9: Multiple integer overflows in pktlength
ghsa_unreviewed·2022-05-17
CVE-2012-4502 [MEDIUM] GHSA-93mp-m23x-f3x9: Multiple integer overflows in pktlength
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.
OSV
CVE-2012-4502: Multiple integer overflows in pktlength
osv·2013-11-05·CVSS 5.0
CVE-2012-4502 [MEDIUM] CVE-2012-4502: Multiple integer overflows in pktlength
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.
Red Hat
chrony: Two security flaws fixed in chrony-1.29 release
vendor_redhat·2013-08-09·CVSS 5.0
CVE-2012-4502 [MEDIUM] chrony: Two security flaws fixed in chrony-1.29 release
chrony: Two security flaws fixed in chrony-1.29 release
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.
Package: chrony (Red Hat Enterprise Linux 7) - Not affected
Debian
CVE-2012-4502: chrony - Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote att...
vendor_debian·2012·CVSS 5.0
CVE-2012-4502 [MEDIUM] CVE-2012-4502: chrony - Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote att...
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.
Scope: local
bookworm: resolved (fixed in 1.29-1)
bullseye: resolved (fixed in 1.29-1)
forky: resolved (fixed in 1.29-1)
sid: resolved (fixed in 1.29-1)
trixie: resolved (fixed in 1.29-1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [epel-all]
bugzilla·2013-08-09·CVSS 5.0
CVE-2012-4503 [MEDIUM] CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [epel-all]
CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [epel-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora EPEL.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when available.
Pleas
Bugzilla
CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [fedora-all]
bugzilla·2013-08-09·CVSS 5.0
CVE-2012-4503 [MEDIUM] CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [fedora-all]
CVE-2012-4503 CVE-2012-4502 chrony: Two security flaws fixed in chrony-1.29 release [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When creating a Bodhi update request, please use the bodhi submission link
noted in the next comment(s). This will include the bug IDs of this
tracking bug as well as the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
Bodhi notes field when available.
Please n
Bugzilla
CVE-2012-4502 CVE-2012-4503 chrony: Two security flaws fixed in chrony-1.29 release
bugzilla·2012-08-07·CVSS 5.0
CVE-2012-4502 [MEDIUM] CVE-2012-4502 CVE-2012-4503 chrony: Two security flaws fixed in chrony-1.29 release
CVE-2012-4502 CVE-2012-4503 chrony: Two security flaws fixed in chrony-1.29 release
In pktlength.c:PKL_CommandLength(), the computation in the REQ_SUBNETS_ACCESSED/REQ_CLIENT_ACCESSES cases can overflow, and PKL_CommandLength can return a negative value. As a result, the subsequent attempt to hash the packet triggers an out-of-bounds read, segmentation fault, and daemon crash. Attacks are possible from IP addresses listed in the cmdallow ACL (restricted to localhost by default) by sending UDP packets to port 323; no additional authentication is required.
The length computations in pktlength.c:PKL_ReplyLength() should be guarded against overflow, too.
Discussion:
Chrony upstream has released 1.29 version correcting the following two security flaws:
* CVE-2012-4502: Buffer overflow when
http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1http://permalink.gmane.org/gmane.comp.time.chrony.announce/15http://seclists.org/oss-sec/2013/q3/332http://www.debian.org/security/2013/dsa-2760https://bugzilla.redhat.com/show_bug.cgi?id=846392http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1http://permalink.gmane.org/gmane.comp.time.chrony.announce/15http://seclists.org/oss-sec/2013/q3/332http://www.debian.org/security/2013/dsa-2760https://bugzilla.redhat.com/show_bug.cgi?id=846392
2013-11-05
Published