Vulnerability in Stashcat Heinekingmedia
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
References
- seclists.org/fulldisclosure/2017/Jul/90 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-11136?
- CVE-2017-11136 is a medium-severity vulnerability in Stashcat Heinekingmedia. CVSS score: 6.5/10. Published 2017-08-01.
- How severe is CVE-2017-11136?
- Medium severity. CVSS v3 base score is 6.5 out of 10.