musl libc up to 1.0.3/1.1.1 DNS Response network/dn_expand.c __dn_expand out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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9.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in musl libc up to 1.0.3/1.1.1. Affected by this vulnerability is the function __dn_expand of the file network/dn_expand.c of the component DNS Response Handler. This manipulation causes out-of-bounds write. This vulnerability is registered as CVE-2014-3484. Remote exploitation of the attack is possible. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in musl libc up to 1.0.3/1.1.1. It has been declared as very critical. Affected by this vulnerability is the function __dn_expand of the file network/dn_expand.c of the component DNS Response Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Multiple stack-based buffer overflows in the __dn_expand function in network/dn_expand.c in musl libc 1.1x before 1.1.2 and 0.9.13 through 1.0.3 allow remote attackers to (1) have unspecified impact via an invalid name length in a DNS response or (2) cause a denial of service (crash) via an invalid name length in a DNS response, related to an infinite loop with no output.

The weakness was published 04/22/2023. It is possible to read the advisory at git.musl-libc.org. This vulnerability is known as CVE-2014-3484 since 05/14/2014. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/22/2023).

Upgrading to version 1.1.2 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.musl-libc.org. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.6

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libc 1.1.2
Patch: git.musl-libc.org

Timelineinfo

05/14/2014 🔍
04/21/2023 +3264 days 🔍
04/22/2023 +0 days 🔍
04/22/2023 +0 days 🔍

Sourcesinfo

Advisory: git.musl-libc.org
Status: Confirmed

CVE: CVE-2014-3484 (🔍)
GCVE (CVE): GCVE-0-2014-3484
GCVE (VulDB): GCVE-100-227095

Entryinfo

Created: 04/22/2023 00:55
Changes: 04/22/2023 00:55 (59)
Complete: 🔍
Cache ID: 216::103

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