7.5

CVE-2013-2028: f5 nginx Out-of-bounds Write

CVSS: 7.5v2.0HighModified
Published 18-07-2013Last modified 06-08-2024

Vulnerability summary

CVE-2013-2028 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in f5 nginx. EPSS estimates a 87.48% chance of exploitation in the next 30 days, higher than 99.7% of scored vulnerabilities. 6 public exploits are recorded.

Overall risk
57/100
0100
High · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v2.0 (NVD)
EPSS score
87.48%
0%100%
Critical · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits6reference, exploit-database, metasploit

Timeline

  1. 18-07-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

87.48%

Chance of exploitation in the next 30 days

Percentile

100%

Versus all other CVEs

30-day change

0.00 pp

From 87.48% on 19-09-2026

19-09-202619-10-2026
EPSS score
87.48%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

6 found
  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • exploit-databasedoslinuxUnverified

    Nginx 1.3.9 < 1.4.0 - Denial of Service (PoC)

    Maturity: poc

  • exploit-databaseremotelinuxVerified

    Nginx 1.3.9 < 1.4.0 - Chuncked Encoding Stack Buffer Overflow (Metasploit)

    Maturity: weaponized

Show all 6 exploits
  • exploit-databaseremotelinux_x86Unverified

    Nginx 1.3.9/1.4.0 (x86) - Brute Force

    Maturity: poc

  • exploit-databaseremotelinux_x86-64Unverified

    Nginx 1.4.0 (Generic Linux x64) - Remote Overflow

    Maturity: poc

  • MetasploitMetasploitremoteVerified

    Nginx HTTP Server 1.3.9-1.4.0 Chunked Encoding Stack Buffer Overflow

    exploit/linux/http/nginx_chunked_size

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

F51 product
  • nginx≥ 1.3.9, ≤ 1.4.0
Fedoraproject1 product

2 vendors · 2 products

References

10 links