Strix
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CVE-2013-4207

UnknownEPSS 1.83%

Last modified

CVE-2013-4207 is a vulnerability of currently unknown severity. Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

Description

Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.

Metrics

EPSS Probability
1.83%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
PuttyPutty0.45—
PuttyPutty0.46—
PuttyPutty0.47—
PuttyPutty0.48—
PuttyPutty0.49—
PuttyPutty0.50—
PuttyPutty0.51—
PuttyPutty0.52—
PuttyPutty0.53b—
PuttyPutty0.54—
PuttyPutty0.55—
PuttyPutty0.56—
PuttyPutty0.57—
PuttyPutty0.58—
PuttyPutty0.59—
PuttyPutty0.60—
PuttyPutty0.61—
PuttyPutty2010-06-01R8967
Simon TathamPutty<= 0.62—
Simon TathamPutty0.53—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2013-4207?
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
How severe is CVE-2013-4207?
Severity scoring for CVE-2013-4207 is pending analysis. The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.
How do I fix CVE-2013-4207?
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.

Are you affected by CVE-2013-4207?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST