PT-2018-3946 · Libpng+2 · Libpng+2

Published 2018-07-11 · Updated 2026-04-14 · CVE-2018-14550

Positive Technologies (AI Summary)

CVSS v2.0

10

Critical

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Libpng versions prior to 1.6.36

Description The issue is related to a stack-based buffer overflow in the get token function in pnm2png.c of the libpng library, which can be exploited by a remote attacker to access sensitive data, compromise data integrity, and cause a denial of service.

Recommendations For versions prior to 1.6.36, update to version 1.6.36 or later to resolve the issue. As a temporary workaround, consider restricting access to the get token function in pnm2png.c until a patch is available.

Exploit

Fix

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

ALT-PU-2019-1049

ALT-PU-2019-2547

ALT-PU-2021-1906

ALT-PU-2021-2382

ALT-PU-2021-3670

AZL-44014

AZL-45027

BDU:2023-07609

CLEANSTART-2026-KK07808

CLEANSTART-2026-NJ21771

CVE-2018-14550

GHSA-QWWR-QC2P-6283

Affected Products

Alt Linux

Astra Linux

Libpng

References · 30

• 🔥 https://github.com/glennrp/libpng/issues/246 · Exploit
• 🔥 https://github.com/fouzhe/security/tree/master/libpng#stack-buffer-overflow-in-png2pnm-in-function-get_token · Exploit
• https://security.gentoo.org/glsa/201908-02 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2023-1023SE17 · Vendor Advisory
• https://oracle.com/security-alerts/cpuApr2021.html · Patch
• https://oracle.com/security-alerts/cpuoct2021.html · Patch
• https://osv.dev/vulnerability/AZL-44014 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-14550 · Security Note
• https://osv.dev/vulnerability/AZL-45027 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-14550 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-14550 · Vendor Advisory
• https://osv.dev/vulnerability/CLEANSTART-2026-NJ21771 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-14048 · Security Note
• https://osv.dev/vulnerability/GHSA-qwwr-qc2p-6283 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-7317 · Security Note