PT-2013-1679 · Chrony+1 · Chrony+1
Florian Weimer
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Published
2013-11-05
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Updated
2024-06-15
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CVE-2012-4502
CVSS v2.0
5.0
Medium
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Name of the Vulnerable Software and Affected Versions
Chrony versions prior to 1.29
Description
The issue is caused by multiple integer overflows in the pktlength.c file, which can be exploited by remote attackers to cause a denial of service (crash). This can be achieved by sending crafted command requests, such as
REQ SUBNETS ACCESSED or REQ CLIENT ACCESSES, to the PKL CommandLength function, or by sending crafted command replies, including RPY SUBNETS ACCESSED, RPY CLIENT ACCESSES, RPY CLIENT ACCESSES BY INDEX, or RPY MANUAL LIST, to the PKL ReplyLength function. These crafted requests or replies can trigger an out-of-bounds read or buffer overflow.Recommendations
For Chrony versions prior to 1.29, update to version 1.29 or later to resolve the issue. As a temporary workaround, consider restricting access to the
PKL CommandLength and PKL ReplyLength functions to minimize the risk of exploitation. Additionally, avoid using the REQ SUBNETS ACCESSED and REQ CLIENT ACCESSES command requests, as well as the RPY SUBNETS ACCESSED, RPY CLIENT ACCESSES, RPY CLIENT ACCESSES BY INDEX, and RPY MANUAL LIST command replies, until the issue is resolved.Exploit
Fix
DoS
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Chrony