5.1

CVE-2013-4788: gnu glibc Improper Input Validation

CVSS: 5.1v2.0MediumModified
AliasesUBUNTU-CVE-2013-4788DEBIAN-CVE-2013-4788
Published 04-10-2013Last modified 06-08-2024
Open JSON

Vulnerability summary

CVE-2013-4788 is a medium (CVSS 5.1) Improper Input Validation vulnerability in gnu glibc. EPSS estimates a 11.43% chance of exploitation in the next 30 days, higher than 95.9% of scored vulnerabilities. 3 public exploits are recorded.

Overall risk
33/100
0100
Medium · default modelHow is this calculated?
CVSS score
5.1/10
010
Medium · v2.0 (NVD)
EPSS score
11.43%
0%100%
Medium · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits3reference, exploit-database

Advisory lineage

Upstream 0 · Downstream 2
DLA-165-1MGASA-2013-0340

Timeline

  1. 04-10-2013
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

The PTR_MANGLE implementation in the GNU C Library (aka glibc or libc6) 2.4, 2.17, and earlier, and Embedded GLIBC (EGLIBC) does not initialize the random value for the pointer guard, which makes it easier for context-dependent attackers to control execution flow by leveraging a buffer-overflow vulnerability in an application and using the known zero value pointer guard to calculate a pointer address.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

11.43%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

0.00 pp

From 11.43% on 19-09-2026

19-09-202619-10-2026
EPSS score
11.43%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

3 found
  • referenceUnverified

    Exploit Reference (openwall.com)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (hmarco.org)

    Maturity: unknown

  • exploit-databaselocallinuxUnverified

    glibc and eglibc 2.5/2.7/2.13 - Local Buffer Overflow

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • glibc< 2.17-94
Gnu1 product
  • glibc≤ 2.17 | 2.0 | 2.0.1 | 2.0.2 | 2.0.3 | 2.0.4 | 2.0.5 | 2.0.6 | 2.1 | 2.11 | 2.1.1.6 | 2.12 | 2.13 | 2.19 | 2.4 | 2.10.1 | 2.11.1 | 2.11.2 | 2.11.3 | 2.12.1 | 2.12.2 | 2.14 | 2.14.1 | 2.15 | 2.16
Ubuntu1 product
  • eglibc< 2.18-0ubuntu1

3 vendors · 3 products

References

10 links