Squid 3.5.276.8 Chunked Decoder Recursion DoS
CVE-2024-25111 Published on March 6, 2024
SQUID-2024:1 Denial of Service in HTTP Chunked Decoding
Squid is a web proxy cache. Starting in version 3.5.27 and prior to version 6.8, Squid may be vulnerable to a Denial of Service attack against HTTP Chunked decoder due to an uncontrolled recursion bug. This problem allows a remote attacker to cause Denial of Service when sending a crafted, chunked, encoded HTTP Message. This bug is fixed in Squid version 6.8. In addition, patches addressing this problem for the stable releases can be found in Squid's patch archives. There is no workaround for this issue.
Vulnerability Analysis
CVE-2024-25111 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2024-25111 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2024-25111
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Affected Versions
squid-cache squid:- Version >= 3.5.27, < 6.8 is affected.
- Before * is affected.
- Version 3.5.27 and below 6.8 is affected.
- Version 38 is affected.
- Version 39 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.