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CVE Vulnerabilities

CVE-2021-23206

Stack-based Buffer Overflow

Published: Mar 02, 2022 | Modified: Nov 21, 2024
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2021-23206
CWEhttps://cwe.mitre.org/data/definitions/121.html

A flaw was found in htmldoc in v1.9.12 and prior. A stack buffer overflow in parse_table() in ps-pdf.cxx may lead to execute arbitrary code and denial of service.

Weakness

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

Affected Software

NameVendorStart VersionEnd Version
HtmldocHtmldoc_project*1.9.12 (including)
HtmldocUbuntubionic*
HtmldocUbuntuesm-apps/bionic*
HtmldocUbuntuesm-apps/focal*
HtmldocUbuntuesm-apps/xenial*
HtmldocUbuntuesm-infra-legacy/trusty*
HtmldocUbuntufocal*
HtmldocUbuntugroovy*
HtmldocUbuntuhirsute*
HtmldocUbuntuimpish*
HtmldocUbuntukinetic*
HtmldocUbuntulunar*
HtmldocUbuntumantic*
HtmldocUbuntutrusty*
HtmldocUbuntutrusty/esm*
HtmldocUbuntuupstream*
HtmldocUbuntuxenial*

Potential Mitigations

  • Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

References

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