Improper Validation of Integrity Check Value Affecting tlslite-ng package, versions <0.7.4-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIAN10-TLSLITENG-268840
- published18 Apr 2018
- disclosed18 Apr 2018
Introduced: 18 Apr 2018
CVE-2018-1000159 (opens in a new tab)How to fix?
Upgrade Debian:10 tlslite-ng to version 0.7.4-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream tlslite-ng package and not the tlslite-ng package as distributed by Debian.
See How to fix? for Debian:10 relevant fixed versions and status.
tlslite-ng version 0.7.3 and earlier, since commit d7b288316bca7bcdd082e6ccff5491e241305233 contains a CWE-354: Improper Validation of Integrity Check Value vulnerability in TLS implementation, tlslite/utils/constanttime.py: ct_check_cbc_mac_and_pad(); line "end_pos = data_len - 1 - mac.digest_size" that can result in an attacker manipulating the TLS ciphertext which will not be detected by receiving tlslite-ng. This attack appears to be exploitable via man in the middle on a network connection. This vulnerability appears to have been fixed after commit 3674815d1b0f7484454995e2737a352e0a6a93d8.