CVE-2010-4052

CVE-2010-4052 is a medium-severity vulnerability in Gnu Glibc with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 51% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 51% (99th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-399
• Affected product: Gnu Glibc
• Published: 2011-01-13
• Last modified: 2026-06-16

Description

Stack consumption vulnerability in the regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (resource exhaustion) via a regular expression containing adjacent repetition operators, as demonstrated by a {10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD.

Frequently asked questions

What is CVE-2010-4052?

Stack consumption vulnerability in the regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (resource exhaustion) via a regular expression containing adjacent repetition operators, as demonstrated by a {10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD.

How severe is CVE-2010-4052?

CVE-2010-4052 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2010-4052 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 51% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-4052?

CVE-2010-4052 primarily affects Gnu Glibc. In total, 28 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-4052?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-4052 published?

CVE-2010-4052 was published on 2011-01-13 and last updated on 2026-06-16.

References

• http://cxib.net/stuff/proftpd.gnu.c
• http://seclists.org/fulldisclosure/2011/Jan/78
• http://secunia.com/advisories/42547
• http://securityreason.com/achievement_securityalert/93
• http://securityreason.com/securityalert/8003
• http://securitytracker.com/id?1024832
• http://www.exploit-db.com/exploits/15935
• http://www.kb.cert.org/vuls/id/912279
• http://www.securityfocus.com/archive/1/515589/100/0/threaded
• http://www.securityfocus.com/bid/45233
• https://bugzilla.redhat.com/show_bug.cgi?id=645859

Affected products (28)

• cpe:2.3:a:gnu:glibc:1.00:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.01:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.02:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.03:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.04:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.05:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.06:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.07:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.08:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.09:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:1.09.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.1.6:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.3.10:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.1.9:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.10:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.10.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.10.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.11:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.11.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.11.2:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.11.3:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.12.0:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.12.1:*:*:*:*:*:*:*
• cpe:2.3:a:gnu:glibc:2.12.2:*:*:*:*:*:*:*

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