PT-2021-9100 · Libressl · Libressl

Published 2021-06-30 · Updated 2021-07-08 · CVE-2019-25048

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions LibreSSL versions 2.9.1 through 3.2.1

Description The issue is a heap-based buffer over-read in the do print ex function, which is called from asn1 item print ctx and ASN1 item print.

Recommendations For LibreSSL versions 2.9.1 through 3.2.1, consider disabling the do print ex function as a temporary workaround until a patch is available. Restrict access to the asn1 item print ctx and ASN1 item print functions to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2019-25048

Affected Products

Libressl

References · 6

• 🔥 https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13914 · Exploit
• https://github.com/libressl-portable/portable/commit/17c88164016df821df2dff4b2b1291291ec4f28a · Patch
• https://osv.dev/vulnerability/CVE-2019-25048 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2019-25048 · Security Note
• https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libressl/OSV-2020-1923.yaml · Note
• https://t.me/cvenotify/17239 · Telegram Post