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Double Free Affecting libwebp package, versions <0.6.1-2.1+deb11u1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.05% (16th percentile)
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NVD
7.5 high
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SUSE
7.5 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN11-LIBWEBP-5489177
  • published 29 Apr 2023
  • disclosed 20 Jun 2023
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Introduced: 29 Apr 2023

CVE-2023-1999 Open this link in a new tab
CWE-415 Open this link in a new tab
CWE-416 Open this link in a new tab

How to fix?

Upgrade Debian:11 libwebp to version 0.6.1-2.1+deb11u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwebp package and not the libwebp package as distributed by Debian. See How to fix? for Debian:11 relevant fixed versions and status.

There exists a use after free/double free in libwebp. An attacker can use the ApplyFiltersAndEncode() function and loop through to free best.bw and assign best = trial pointer. The second loop will then return 0 because of an Out of memory error in VP8 encoder, the pointer is still assigned to trial and the AddressSanitizer will attempt a double free.