Facebook proxygen up to 2025.12.01.00 Body proxygen::coro iteration

CVSS Meta Temp Score
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Facebook proxygen up to 2025.12.01.00. Affected by this issue is the function proxygen::coro of the component Body Handler. Such manipulation leads to iteration. This vulnerability is listed as CVE-2025-55181. The attack may be performed from remote. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Facebook proxygen up to 2025.12.01.00 and classified as problematic. Affected by this issue is the function proxygen::coro of the component Body Handler. The manipulation with an unknown input leads to a iteration vulnerability. Using CWE to declare the problem leads to CWE-834. The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. Impacted is availability. CVE summarizes:

Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in proxygen::coro::HTTPQuicCoroSession which blocks the backing event loop and unconditionally appends data to a std::vector per-loop iteration. This issue leads to unbounded memory growth and eventually causes the process to run out of memory.

The advisory is shared for download at facebook.com. This vulnerability is handled as CVE-2025-55181 since 08/08/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Applying the patch 17689399ef99b7c3d3a8b2b768b1dba1a4b72f8f is able to eliminate this problem. The bugfix is ready for download at github.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-200372). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (Meta): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Iteration
CWE: CWE-834 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: 17689399ef99b7c3d3a8b2b768b1dba1a4b72f8f

Timelineinfo

08/08/2025 CVE reserved
12/03/2025 +117 days Advisory disclosed
12/03/2025 +0 days VulDB entry created
12/03/2025 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: facebook.com
Status: Confirmed

CVE: CVE-2025-55181 (🔒)
GCVE (CVE): GCVE-0-2025-55181
GCVE (VulDB): GCVE-100-334148
EUVD: 🔒

Entryinfo

Created: 12/03/2025 07:51
Updated: 12/03/2025 10:17
Changes: 12/03/2025 07:51 (67), 12/03/2025 10:17 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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