Vulnerabilities > CVE-2020-12723 - Classic Buffer Overflow vulnerability in multiple products

047910
CVSS 7.5 - HIGH
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH

Summary

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.

Vulnerable Configurations

Part Description Count
Application
Perl
468
Application
Netapp
2
Application
Oracle
37
OS
Fedoraproject
1
OS
Opensuse
1

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familyFedora Local Security Checks
    NASL idFEDORA_2020-4021BF2AE8.NASL
    descriptionFixed CVE-2020-10543, CVE-2020-10878 and CVE-2020-12723 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.
    last seen2020-06-12
    modified2020-06-05
    plugin id137157
    published2020-06-05
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137157
    titleFedora 32 : 4:perl (2020-4021bf2ae8)
  • NASL familyGentoo Local Security Checks
    NASL idGENTOO_GLSA-202006-03.NASL
    descriptionThe remote host is affected by the vulnerability described in GLSA-202006-03 (Perl: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Perl. Please review the CVE identifiers referenced below for details. Impact : Please review the referenced CVE identifiers for details. Workaround : There is no known workaround at this time.
    last seen2020-06-13
    modified2020-06-12
    plugin id137383
    published2020-06-12
    reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/137383
    titleGLSA-202006-03 : Perl: Multiple vulnerabilities

References