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Out-of-bounds Write Affecting squid:4/libecap package, versions <0:1.0.1-2.module_el8.6.0+2741+01592ae8

Severity

 Recommended
high

Based on AlmaLinux security rating

    Threat Intelligence

    EPSS
    12.49% (96th percentile)

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  • Snyk ID SNYK-ALMALINUX8-SQUID-5622478
  • published 28 May 2023
  • disclosed 6 May 2020
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Introduced: 6 May 2020

CVE-2019-12525 Open this link in a new tab
CWE-787 Open this link in a new tab

How to fix?

Upgrade AlmaLinux:8 squid:4/libecap to version 0:1.0.1-2.module_el8.6.0+2741+01592ae8 or higher.
This issue was patched in ALSA-2020:2041.

NVD Description

Note: Versions mentioned in the description apply only to the upstream squid:4/libecap package and not the squid:4/libecap package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token's value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.

References

CVSS Scores

version 3.1
Expand this section

NVD

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