Strix
26.1K

CVE-2013-2061

UnknownEPSS 2.81%

Last modified

CVE-2013-2061 is a vulnerability of currently unknown severity. The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.. EPSS estimates a 2.81% chance of exploitation in the next 30 days.

Description

The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.

Metrics

EPSS Probability
2.81%

84.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
OpenvpnOpenvpn<= 2.3.0
OpenvpnOpenvpn1.2.0
OpenvpnOpenvpn1.2.1
OpenvpnOpenvpn1.3.0
OpenvpnOpenvpn1.3.1
OpenvpnOpenvpn1.3.2
OpenvpnOpenvpn1.4.0
OpenvpnOpenvpn1.4.1
OpenvpnOpenvpn1.4.2
OpenvpnOpenvpn1.4.3
OpenvpnOpenvpn1.5.0
OpenvpnOpenvpn1.6.0
OpenvpnOpenvpn2.1.0
OpenvpnOpenvpn2.2.0
OpenvpnOpenvpn Access Server2.0.0
OpensuseOpensuse11.4

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2013-2061?
The openvpn_decrypt function in crypto.c in OpenVPN 2.3.0 and earlier, when running in UDP mode, allows remote attackers to obtain sensitive information via a timing attack involving an HMAC comparison function that does not run in constant time and a padding oracle attack on the CBC mode cipher.
How severe is CVE-2013-2061?
Severity scoring for CVE-2013-2061 is pending analysis. The EPSS model estimates a 2.81% probability of exploitation in the next 30 days.
How do I fix CVE-2013-2061?
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-2013-2061?

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

Scan your code now

Source: NVD / NIST