Out-of-Bounds Affecting openssl package, versions <1:1.0.1e-51.el7_2.5


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    35.97% (98th percentile)

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  • Snyk ID SNYK-RHEL7-OPENSSL-4628192
  • published 26 Jul 2021
  • disclosed 26 Feb 2016

How to fix?

Upgrade RHEL:7 openssl to version 1:1.0.1e-51.el7_2.5 or higher.
This issue was patched in RHSA-2016:0722.

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.

The fmtstr function in crypto/bio/b_print.c in OpenSSL 1.0.1 before 1.0.1s and 1.0.2 before 1.0.2g improperly calculates string lengths, which allows remote attackers to cause a denial of service (overflow and out-of-bounds read) or possibly have unspecified other impact via a long string, as demonstrated by a large amount of ASN.1 data, a different vulnerability than CVE-2016-2842.

References

CVSS Scores

version 3.1
Expand this section

Red Hat

3.7 low
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    Low