Out-of-bounds Write Affecting nss package, versions <0:3.44.0-9.el8_1


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.29% (70th percentile)

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  • Snyk ID SNYK-RHEL8-NSS-3634870
  • published 26 Jul 2021
  • disclosed 21 Nov 2019

How to fix?

Upgrade RHEL:8 nss to version 0:3.44.0-9.el8_1 or higher.
This issue was patched in RHSA-2019:4114.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nss package and not the nss package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

When encrypting with a block cipher, if a call to NSC_EncryptUpdate was made with data smaller than the block size, a small out of bounds write could occur. This could have caused heap corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.

CVSS Scores

version 3.1
Expand this section

NVD

8.8 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    Required
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    High
  • Integrity (I)
    High
  • Availability (A)
    High
Expand this section

SUSE

8.1 high