VulnerabilityModified

CVE-2023-1999

There exists a use after free/double free in libwebp.

HIGH 7.5EPSS 0.95%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

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.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.95% probability · 59th percentile
CISA KEV: Not listed
Weakness: CWE-416, CWE-415
Affected: webmproject/libwebp
Source: cve-coordination@google.com

References

https://chromium.googlesource.com/webm/libwebpProduct
https://security.gentoo.org/glsa/202309-05
https://chromium.googlesource.com/webm/libwebpProduct
https://security.gentoo.org/glsa/202309-05

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.