CVE-2016-0799

critical-risk
Published 2016-03-03

The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842.

Do I need to act?

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43.5% chance of exploitation in next 30 days
EPSS score — higher than 56% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Vendors

72
/ 100
critical-risk
Severity 32/34 · Critical
Exploitability 17/34 · Moderate
Exposure 23/34 · High