var-202312-0487
Vulnerability from variot
Asterisk is an open source private branch exchange and telephony toolkit. In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6. Digium of Asterisk Race condition vulnerabilities exist in products from multiple vendors.Service operation interruption (DoS) It may be in a state. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512
Debian Security Advisory DSA-5596-1 security@debian.org https://www.debian.org/security/ Markus Koschany January 04, 2024 https://www.debian.org/security/faq
Package : asterisk CVE ID : CVE-2023-37457 CVE-2023-38703 CVE-2023-49294 CVE-2023-49786 Debian Bug : 1059303 1059032 1059033
Multiple security vulnerabilities have been discovered in Asterisk, an Open Source Private Branch Exchange.
CVE-2023-37457
The 'update' functionality of the PJSIP_HEADER dialplan function can exceed
the available buffer space for storing the new value of a header. By doing
so this can overwrite memory or cause a crash. This is not externally
exploitable, unless dialplan is explicitly written to update a header based
on data from an outside source. If the 'update' functionality is not used
the vulnerability does not occur.
CVE-2023-38703
PJSIP is a free and open source multimedia communication library written in
C with high level API in C, C++, Java, C#, and Python languages. SRTP is a
higher level media transport which is stacked upon a lower level media
transport such as UDP and ICE. Currently a higher level transport is not
synchronized with its lower level transport that may introduce a
use-after-free issue. This vulnerability affects applications that have
SRTP capability (`PJMEDIA_HAS_SRTP` is set) and use underlying media
transport other than UDP. This vulnerability’s impact may range from
unexpected application termination to control flow hijack/memory
corruption.
CVE-2023-49294
It is possible to read any arbitrary file even when the `live_dangerously`
option is not enabled.
For the oldstable distribution (bullseye), these problems have been fixed in version 1:16.28.0~dfsg-0+deb11u4.
We recommend that you upgrade your asterisk packages.
For the detailed security status of asterisk please refer to its security tracker page at: https://security-tracker.debian.org/tracker/asterisk
Further information about Debian Security Advisories, how to apply these updates to your system and frequently asked questions can be found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE-----
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In Asterisk prior to versions 18.20.1, 20.5.1, and 21.0.1; as well as certified-asterisk prior to 18.9-cert6; Asterisk is susceptible to a DoS due to a race condition in the hello handshake phase of the DTLS protocol when handling DTLS-SRTP for media setup. This attack can be done continuously, thus denying new DTLS-SRTP encrypted calls during the attack. Abuse of this vulnerability may lead to a massive Denial of Service on vulnerable Asterisk servers for calls that rely on DTLS-SRTP. Commit d7d7764cb07c8a1872804321302ef93bf62cba05 contains a fix, which is part of versions 18.20.1, 20.5.1, 21.0.1, amd 18.9-cert6. Digium of Asterisk Race condition vulnerabilities exist in products from multiple vendors.Service operation interruption (DoS) It may be in a state. -----BEGIN PGP SIGNED MESSAGE-----\nHash: SHA512\n\n- -------------------------------------------------------------------------\nDebian Security Advisory DSA-5596-1 security@debian.org\nhttps://www.debian.org/security/ Markus Koschany\nJanuary 04, 2024 https://www.debian.org/security/faq\n- -------------------------------------------------------------------------\n\nPackage : asterisk\nCVE ID : CVE-2023-37457 CVE-2023-38703 CVE-2023-49294 CVE-2023-49786\nDebian Bug : 1059303 1059032 1059033\n\nMultiple security vulnerabilities have been discovered in Asterisk, an Open\nSource Private Branch Exchange. \n\nCVE-2023-37457\n\n The \u0027update\u0027 functionality of the PJSIP_HEADER dialplan function can exceed\n the available buffer space for storing the new value of a header. By doing\n so this can overwrite memory or cause a crash. This is not externally\n exploitable, unless dialplan is explicitly written to update a header based\n on data from an outside source. If the \u0027update\u0027 functionality is not used\n the vulnerability does not occur. \n\nCVE-2023-38703\n\n PJSIP is a free and open source multimedia communication library written in\n C with high level API in C, C++, Java, C#, and Python languages. SRTP is a\n higher level media transport which is stacked upon a lower level media\n transport such as UDP and ICE. Currently a higher level transport is not\n synchronized with its lower level transport that may introduce a\n use-after-free issue. This vulnerability affects applications that have\n SRTP capability (`PJMEDIA_HAS_SRTP` is set) and use underlying media\n transport other than UDP. This vulnerability\u2019s impact may range from\n unexpected application termination to control flow hijack/memory\n corruption. \n\nCVE-2023-49294\n\n It is possible to read any arbitrary file even when the `live_dangerously`\n option is not enabled. \n\n\nFor the oldstable distribution (bullseye), these problems have been fixed\nin version 1:16.28.0~dfsg-0+deb11u4. \n\nWe recommend that you upgrade your asterisk packages. \n\nFor the detailed security status of asterisk please refer to\nits security tracker page at:\nhttps://security-tracker.debian.org/tracker/asterisk\n\nFurther information about Debian Security Advisories, how to apply\nthese updates to your system and frequently asked questions can be\nfound at: https://www.debian.org/security/\n\nMailing list: debian-security-announce@lists.debian.org\n-----BEGIN PGP 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Sightings
Author | Source | Type | Date |
---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.