9.8

CVE-2019-11921: facebook proxygen Out-of-bounds Write

CVSS: 9.8v3.0CriticalModified
Published 25-07-2019Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2019-11921 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in facebook proxygen. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.2% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.0 (NVD)
EPSS score
2.08%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 25-07-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

Description

An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper handling of Base64 when parsing malformed binary content in Structured HTTP Headers. This issue affects versions of proxygen prior to v2019.07.22.00.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

2.08%

Chance of exploitation in the next 30 days

Percentile

81%

Versus all other CVEs

30-day change

0.00 pp

From 2.08% on 20-09-2026

20-09-202620-10-2026
EPSS score
2.08%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Facebook1 product
  • proxygenv2019.07.22.00 | ≥ unspecified, < v2019.07.22.00 | < 2019.07.22.00

1 vendor · 1 product

References

2 links