Divide By Zero Affecting kernel-uek-debug package, versions <0:2.6.32-100.28.9.el5


Severity

high

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    0.04% (1st percentile)

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  • Snyk ID SNYK-ORACLE5-KERNELUEKDEBUG-2461352
  • published 10 Apr 2022
  • disclosed 22 Nov 2010

How to fix?

Upgrade Oracle:5 kernel-uek-debug to version 0:2.6.32-100.28.9.el5 or higher.
This issue was patched in ELSA-2011-2010.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-uek-debug package and not the kernel-uek-debug package as distributed by Oracle. See How to fix? for Oracle:5 relevant fixed versions and status.

The do_tcp_setsockopt function in net/ipv4/tcp.c in the Linux kernel before 2.6.37-rc2 does not properly restrict TCP_MAXSEG (aka MSS) values, which allows local users to cause a denial of service (OOPS) via a setsockopt call that specifies a small value, leading to a divide-by-zero error or incorrect use of a signed integer.

References

CVSS Scores

version 3.1
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Snyk

6.2 high
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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NVD

6.2 medium
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Red Hat

6.2 medium