CVE-2022-2085

NameCVE-2022-2085
DescriptionA NULL pointer dereference vulnerability was found in Ghostscript, which occurs when it tries to render a large number of bits in memory. When allocating a buffer device, it relies on an init_device_procs defined for the device that uses it as a prototype that depends upon the number of bits per pixel. For bpp > 64, mem_x_device is used and does not have an init_device_procs defined. This flaw allows an attacker to parse a large number of bits (more than 64 bits per pixel), which triggers a NULL pointer dereference flaw, causing an application to crash.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
ghostscript (PTS)buster9.27~dfsg-2+deb10u5fixed
buster (security)9.27~dfsg-2+deb10u6fixed
bullseye (security), bullseye9.53.3~dfsg-7+deb11u2fixed
bookworm, sid10.0.0~dfsg-9fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
ghostscriptsourcestretch(not affected)
ghostscriptsourcebuster(not affected)
ghostscriptsourcebullseye(not affected)
ghostscriptsource(unstable)9.56.0~dfsg-1

Notes

[bullseye] - ghostscript <not-affected> (Vulnerable code not present)
[buster] - ghostscript <not-affected> (Vulnerable code not present)
[stretch] - ghostscript <not-affected> (Vulnerable code not present)
https://bugs.ghostscript.com/show_bug.cgi?id=704945
Fixed by: https://git.ghostscript.com/?p=ghostpdl.git;h=ae1061d948d88667bdf51d47d918c4684d0f67df (ghostpdl-9.56.0rc1)
Introduced by: https://git.ghostscript.com/?p=ghostpdl.git;h=6f332dd0baee0135ebff0bf25c56e9adff0f944a (ghostpdl-9.55.0rc1)

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