PYSEC-2018-31

    Dashboard / Vulnerabilities / PYSEC-2018-31

    PYSEC-2018-31

    Published: 18 Apr 2018Last Modified: 8 Nov 2023

    Summary:

    Details: 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.

    References: https://github.com/tomato42/tlslite-ng/pull/234, https://github.com/advisories/GHSA-cwh5-3cw7-4286

    Affected packages

    Package

    Name: tlslite-ng

    Purl: pkg:pypi/tlslite-ng

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.7.4

    Affected versions

    0.5.0
    0.5.0-beta1
    0.5.0-beta2
    0.5.0-beta3
    0.5.0-beta4
    0.5.0-beta5
    0.5.0-beta6
    0.5.1
    0.5.2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High