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CVE-2017-11136

UnknownEPSS 0.50%

Last modified

CVE-2017-11136 is a vulnerability of currently unknown severity. An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. EPSS estimates a 0.50% chance of exploitation in the next 30 days.

Description

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. However, the private RSA key is not only stored on the client but transmitted to the backend, too. Moreover, the key to decrypt the private key is composed of the first 32 bytes of the SHA-512 hash of the user password. But this hash is stored on the backend, too. Therefore, everyone with access to the backend database can read the transmitted secret for symmetric encryption, hence can read the communication.

Metrics

EPSS Probability
0.50%

39.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
StashcatHeinekingmedia<= 1.7.5
StashcatHeinekingmedia<= 0.0.80w
StashcatHeinekingmedia<= 0.0.86w

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2017-11136?
An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. However, the private RSA key is not only stored on the client but transmitted to the backend, too. Moreover, the key to decrypt the private key is composed of the first 32 bytes of the SHA-512 hash of the user password. But this hash is stored on the backend, too. Therefore, everyone with access to the backend database can read the transmitted secret for symmetric encryption, hence can read the communication.
How severe is CVE-2017-11136?
Severity scoring for CVE-2017-11136 is pending analysis. The EPSS model estimates a 0.50% probability of exploitation in the next 30 days.
How do I fix CVE-2017-11136?
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