Strix
26.1K

CVE-2019-10740

MEDIUMCVSS 4.3/10EPSS 0.77%

Last modified

CVE-2019-10740 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. In Roundcube Webmail before 1.3.10, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

In Roundcube Webmail before 1.3.10, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.

Metrics

CVSS 3.1
4.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

EPSS Probability
0.77%

51.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
RoundcubeWebmail< 1.3.10—
FedoraprojectFedora29—
OpensuseBackports Sle15.0Sp1
OpensuseLeap15.1—
OpensuseLeap15.2—

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-10740?
In Roundcube Webmail before 1.3.10, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker.
How severe is CVE-2019-10740?
CVE-2019-10740 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.
How do I fix CVE-2019-10740?
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-2019-10740?

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

Scan your code now

Source: NVD / NIST