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CVE-2012-4502

UnknownEPSS 3.27%

Last modified

CVE-2012-4502 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 3.27% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
3.27%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
TuxfamilyChrony<= 1.28—
TuxfamilyChrony1.0—
TuxfamilyChrony1.1—
TuxfamilyChrony1.18—
TuxfamilyChrony1.19—
TuxfamilyChrony1.19.99.1—
TuxfamilyChrony1.19.99.2—
TuxfamilyChrony1.19.99.3—
TuxfamilyChrony1.20—
TuxfamilyChrony1.21—
TuxfamilyChrony1.23—
TuxfamilyChrony1.23.1—
TuxfamilyChrony1.24—
TuxfamilyChrony1.25—
TuxfamilyChrony1.26—
TuxfamilyChrony1.27—
TuxfamilyChrony1.28Pre1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-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) 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.
How severe is CVE-2012-4502?
Severity scoring for CVE-2012-4502 is pending analysis. The EPSS model estimates a 3.27% probability of exploitation in the next 30 days.
How do I fix CVE-2012-4502?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST