Race Condition Affecting openssl package, versions <1:1.0.1e-42.el7_1.8


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    39.38% (98th percentile)

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  • Snyk ID SNYK-RHEL7-OPENSSL-4551292
  • published 26 Jul 2021
  • disclosed 11 Jun 2015

How to fix?

Upgrade RHEL:7 openssl to version 1:1.0.1e-42.el7_1.8 or higher.
This issue was patched in RHSA-2015:1115.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

Race condition in the ssl3_get_new_session_ticket function in ssl/s3_clnt.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b, when used for a multi-threaded client, allows remote attackers to cause a denial of service (double free and application crash) or possibly have unspecified other impact by providing a NewSessionTicket during an attempt to reuse a ticket that had been obtained earlier.

References

CVSS Scores

version 3.1
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NVD

6.3 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    Low
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Red Hat

4.3 medium