CVE-2016-9843

The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC…

published May 23, 2017

CVSS
—
EPSS
6%
Percentile
93.0
In the wild
Unconfirmed
What it is

⚠️ A surprising twist in CRC calculations could let attackers manipulate data in zlib 1.2.8! Think of it like a chef who accidentally uses a recipe that calls for the wrong measuring cup, resulting in a dish that tastes off. In this case, the big-endian calculations in zlib might lead to unexpected behavior, just like that culinary misstep! While the severity remains unclear, the potential for context-dependent attackers to exploit this could lead to data integrity issues—imagine serving a dish that looks right but tastes completely wrong. If exploited, this could create cascading failures in applications relying on zlib for data compression.

Put simply

Think of it like a chef who accidentally uses a recipe that calls for the wrong measuring cup, resulting in a dish that tastes off. In this case, the big-endian calculations in zlib might lead to unexpected behavior, just like that culinary misstep! The vulnerability in the crc32_big function allows for improper CRC calculations due to big-endian formatting issues, potentially leading to undetected data corruption in applications that utilize this library.

What to do

While the severity remains unclear, the potential for context-dependent attackers to exploit this could lead to data integrity issues—imagine serving a dish that looks right but tastes completely wrong. If exploited, this could create cascading failures in applications relying on zlib for data compression. To mitigate this issue, ensure that you're using an updated version of zlib. As of now, there are no known exploits, but keeping your dependencies updated is always best practice. Regularly audit your libraries to prevent any potential mishaps! You've got this! Stay vigilant and keep your software fortress strong! 🛡️

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.05766 · 93.0th percentile
Published
2017-05-23T03:56Z
EPSS history
Timeline
  • 23 MAY 03:56Z
    The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC…
    cvelistv5